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Cleanup
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 07 Dec 2011 17:24:36 +0100
parents f0afece42f48
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1 <!-- $Id: constructor_examples_mfir_content.html,v 1.4 2009/02/27 16:51:57 ingo Exp $ -->
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2
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3 <!-- -------------------------------------------------- -->
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4 <!-- --------------- BEGIN CONTENT FILE --------------- -->
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5 <!-- -------------------------------------------------- -->
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6
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7 <!-- --------------- Link box: begin --------------- -->
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8 <table border="0" summary="Simple list" class="simplelist_nottable_last">
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9 <tr>
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10 <td>
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11 <a href="constructor_examples_mfir.html#copy">Copy an MFIR object</a>
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12 </td>
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13 </tr>
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14 <tr>
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15 <td>
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16 <a href="constructor_examples_mfir.html#xml_file">Construct a MFIR object by loading the object from a file</a>
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17 </td>
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18 </tr>
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19 <tr>
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20 <td>
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21 <a href="constructor_examples_mfir.html#ao">Construct a MFIR object from an Analysis Object <tt>(AO)</tt></a>
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22 </td>
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23 </tr>
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24 <tr>
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25 <td>
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26 <a href="constructor_examples_rational.html#pzmodel">Construct a MFIR object from a pole/zero model <tt>(PZMODEL)</tt></a>
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27 </td>
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28 </tr>
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29 <tr>
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30 <td>
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31 <a href="constructor_examples_mfir.html#std_type">Construct a MFIR object from a standard type</a>
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32 </td>
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33 </tr>
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34 <tr>
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35 <td>
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36 <a href="constructor_examples_mfir.html#exist_model">Construct a MFIR object from an existing filter model</a>
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37 </td>
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38 </tr>
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39 <tr>
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40 <td>
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41 <a href="constructor_examples_mfir.html#equation">Construct a MFIR object from a difference equation</a>
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42 </td>
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43 </tr>
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44 </table>
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45 <!-- --------------- Link box: end --------------- -->
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46
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47 <!-- --------------- NEXT EXAMPLE --------------- -->
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48
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49 <hr>
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50 <h2 class="title"><a name="copy"></a>Copy an FIR filter object</h2>
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51 <p>The following example creates a copy of an FIR filter object (blue command).</p>
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52 <div class="fragment"><pre class="programlisting">
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53 >> fir1 = mfir(plist(<span class="string">'type'</span>, <span class="string">'lowpass'</span>));
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54 <span class="blue">>> fir2 = mfir(fir2)</span>
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55 ------ mfir/1 -------
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56 gd: 32.5
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57 version: $Id: mfir.m,v 1.84 2009/02/24 17:02:44 ingo Exp
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58 ntaps: 65
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59 fs: 1
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60 infile:
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61 a: [0.0007 0.0004 -6.9093e-19 -0.0006 -0.0012 -0.0014 -0.0011 1.4147e-18 ...
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62 histout: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
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63 iunits: [] [1x1 unit]
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64 ounits: [] [1x1 unit]
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65 hist: mfir.hist [1x1 history]
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66 name: lowpass
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67 ---------------------
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68 </pre></div>
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69 <br></br>
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70 <p>REMARK: The following command copies only the handle of an object and doesn't create a copy of the object (as above). This means that everything that happens to the copy or original happens to the other object.</p>
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71 <div class="fragment"><pre class="programlisting">
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72 >> fir1 = mfir()
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73 ------ mfir/1 -------
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74 gd: []
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75 version: $Id: mfir.m,v 1.84 2009/02/24 17:02:44 ingo Exp
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76 ntaps: 0
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77 fs: []
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78 infile:
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79 a: []
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80 histout: []
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81 iunits: [] [1x1 unit]
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82 ounits: [] [1x1 unit]
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83 hist: mfir.hist [1x1 history]
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84 name: none
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85 ---------------------
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86 >> fir2 = fir1;
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87 >> fir2.setName(<span class="string">'my new name'</span>)
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88 ------ mfir/1 -------
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89 gd: []
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90 version: $Id: mfir.m,v 1.84 2009/02/24 17:02:44 ingo Exp
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91 ntaps: 0
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92 fs: []
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93 infile:
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94 a: []
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95 histout: []
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96 iunits: [] [1x1 unit]
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97 ounits: [] [1x1 unit]
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98 hist: mfir.hist [1x1 history]
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99 name: <span class="string">my new name</span>
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100 ---------------------
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101 </pre></div>
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102 <br></br>
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103 <p>If we display fir1 again then we see that the property 'name' was changed although we only have changed fir2.</p>
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104 <div class="fragment"><pre class="programlisting">
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105 >> fir1
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106 ------ mfir/1 -------
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107 gd: []
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108 version: $Id: mfir.m,v 1.84 2009/02/24 17:02:44 ingo Exp
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109 ntaps: 0
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110 fs: []
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111 infile:
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112 a: []
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113 histout: []
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114 iunits: [] [1x1 unit]
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115 ounits: [] [1x1 unit]
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116 hist: mfir.hist [1x1 history]
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117 name: <span class="string">my new name</span>
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118 ---------------------</pre></div>
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119
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120
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121 <!-- --------------- NEXT EXAMPLE --------------- -->
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122
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123 <hr>
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124 <h2 class="title"><a name="xml_file"></a>Construct a MFIR object by loading the object from a file</h2>
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125 <p>The following example creates a new mfir object by loading the mfir object from disk.</p>
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126 <div class="fragment"><pre class="programlisting">
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127 fir = mfir(<span class="string">'fir.mat'</span>)
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128 fir = mfir(<span class="string">'fir.xml'</span>)
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129 </pre></div>
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130 <p>or in a <tt>PLIST</tt></p>
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131 <div class="fragment"><pre class="programlisting">
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132 pl = plist(<span class="string">'filename'</span>, <span class="string">'fir.xml'</span>);
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133 fir = mfir(pl)
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134 </pre></div>
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135
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136 <!-- --------------- NEXT EXAMPLE --------------- -->
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137
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138 <hr>
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139 <h2 class="title"><a name="ao"></a>Construct a MFIR object from an Analysis Object</h2>
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140 <p> An FIR filter object can be generated based on the magnitude of the input AO/fsdata object.
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141 In the following example an AO/fsdata object is first generated and then passed to the mfir constructor
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142 to obtain the equivalent FIR filter.</p>
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143 <div class="fragment"><pre class="programlisting">
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144 a1 = ao(plist(<span class="string">'fsfcn'</span>, <span class="string">'1./(50+f)'</span>, <span class="string">'fs'</span>, 1000, <span class="string">'f'</span>, linspace(0, 500, 1000)));
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145 fir = mfir(a1);
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146 iplot(a1, resp(fir));
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147 </pre></div>
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148 <p>or in a PLIST with the relevant parameters:</p>
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149 <p>
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150 <table cellspacing="0" border="0" cellpadding="2" class="simplelist_nottable_last" width="80%">
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151 <colgroup>
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152 <col width="25%"/>
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153 <col width="75%"/>
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154 </colgroup>
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155 <thead>
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156 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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157 <th class="subcategorylist">Key</th>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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158 <th class="subcategorylist">Description</th>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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159 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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160 </thead>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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161 <tbody>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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162 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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163 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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164 <p>'method'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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165 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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166 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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167 <p>the design method:<br></br>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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168 'frequency-sampling' - uses fir2()<br></br>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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169 'least-squares' - uses firls()<br></br>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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170 'Parks-McClellan' - uses firpm()<br></br>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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171 [default: 'frequency-sampling']</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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172 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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173 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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174 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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175 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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176 <p>'win'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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177 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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178 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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179 <p>Window function for frequency-sampling method [default: 'Hanning']</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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180 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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181 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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182 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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183 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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184 <p>'N'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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185 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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186 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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187 <p>Filter order [default: 512]</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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188 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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189 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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190 </tbody>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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191 </table>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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192 </p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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193 <p>The following example creates a mfir object from an analysis object.</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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194 <div class="fragment"><pre class="programlisting">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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195 a1 = ao(plist(<span class="string">'fsfcn'</span>, <span class="string">'1./(50+f)'</span>, <span class="string">'fs'</span>, 1000, <span class="string">'f'</span>, linspace(0, 500, 1000)));
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Daniele Nicolodi <nicolodi@science.unitn.it>
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196 pl = plist(<span class="string">'ao'</span>, a1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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197 fir = mfir(pl)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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198 </pre></div>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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199
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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200
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Daniele Nicolodi <nicolodi@science.unitn.it>
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201 <!-- --------------- NEXT EXAMPLE --------------- -->
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Daniele Nicolodi <nicolodi@science.unitn.it>
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202
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Daniele Nicolodi <nicolodi@science.unitn.it>
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203 <hr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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204 <h2 class="title"><a name="pzmodel"></a>Construct an FIR filter object from a pole/zero model</h2>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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205 <p>The following example creates a new FIR filter object from a pole/zero model.</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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206 <div class="fragment"><pre class="programlisting">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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207 >> pzm = pzmodel(1, {1 2 3}, {4 5}, <span class="string">'my pzmodel'</span>)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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208 ---- pzmodel 1 ----
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Daniele Nicolodi <nicolodi@science.unitn.it>
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209 name: my pzmodel
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Daniele Nicolodi <nicolodi@science.unitn.it>
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210 gain: 1
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Daniele Nicolodi <nicolodi@science.unitn.it>
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211 delay: 0
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Daniele Nicolodi <nicolodi@science.unitn.it>
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212 iunits: []
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Daniele Nicolodi <nicolodi@science.unitn.it>
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213 ounits: []
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Daniele Nicolodi <nicolodi@science.unitn.it>
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214 pole 001: (f=1 Hz,Q=NaN)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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215 pole 002: (f=2 Hz,Q=NaN)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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216 pole 003: (f=3 Hz,Q=NaN)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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217 zero 001: (f=4 Hz,Q=NaN)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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218 zero 002: (f=5 Hz,Q=NaN)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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219 -------------------
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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220 >> fir = mfir(pzm) <span class="comment">% Use the default sample rate fs=8 * frequency of the highest pole or zero in the model</span>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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221 >> fir = mfir(pzm, plist(<span class="string">'fs'</span>, 100))
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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222 ------ mfir/1 -------
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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223 gd: 257
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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224 version: $Id: mfir.m,v 1.84 2009/02/24 17:02:44 ingo Exp
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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225 ntaps: 513
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Daniele Nicolodi <nicolodi@science.unitn.it>
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226 fs: 100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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227 infile:
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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228 a: [-0 -3.013e-10 -1.2486e-09 -2.8506e-09 -5.1166e-09 -7.8604e-09 -1.1133e-08 ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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229 histout: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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230 iunits: [] [1x1 unit]
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
231 ounits: [] [1x1 unit]
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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232 hist: mfir.hist [1x1 history]
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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233 name: my pzmodel
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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234 ---------------------
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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235 </pre></div>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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236 <p>or in a PLIST with the relevant parameters:</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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237 <p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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238 <table cellspacing="0" border="0" cellpadding="2" class="simplelist_nottable_last" width="80%">
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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239 <colgroup>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
240 <col width="25%"/>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
241 <col width="75%"/>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
242 </colgroup>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
243 <thead>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
244 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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245 <th class="subcategorylist">Key</th>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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246 <th class="subcategorylist">Description</th>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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247 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
248 </thead>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
249 <tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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250 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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251 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
252 <p>'pzmodel'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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253 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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254 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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255 <p>A pzmodel object to construct the filter from [default: empty pzmodel]</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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256 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
257 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
258 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
259 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
260 <p>'fs'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
261 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
262 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
263 <p>Sample rate [default: 8 * frequency of the highest pole or zero in the model]</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
264 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
265 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
266 </tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
267 </table>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
268 </p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
269 <div class="fragment"><pre class="programlisting">
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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270 >> pzm = pzmodel(1, {1 2 3}, {4 5}, <span class="string">'my pzmodel'</span>)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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271 >> pl = plist(<span class="string">'pzmodel'</span>, pzm, <span class="string">'fs'</span>, 100)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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272 >> fir = mfir(pl)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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273 </pre></div>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
274
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
275
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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276 <!-- --------------- NEXT EXAMPLE --------------- -->
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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277
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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278 <hr></hr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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279 <h2 class="title"><a name="std_type"></a>Construct a MFIR object from a standard type</h2>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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280 <p>Construct an FIR filter object from a standard type: 'lowpass', 'highpass', 'bandpass' or 'bandreject'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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281 <p>The relevant parameters are:</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
282 <p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
283 <table cellspacing="0" border="0" cellpadding="2" class="simplelist_nottable_last" width="80%">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
284 <colgroup>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
285 <col width="25%"/>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
286 <col width="75%"/>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
287 </colgroup>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
288 <thead>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
289 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
290 <th class="subcategorylist">Key</th>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
291 <th class="subcategorylist">Description</th>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
292 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
293 </thead>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
294 <tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
295 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
296 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
297 <p>'type'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
298 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
299 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
300 <p>one of the types: 'highpass', 'lowpass', 'bandpass', 'bandreject'<br></br>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
301 [default 'lowpass']</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
302 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
303 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
304 </tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
305 </table>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
306 </p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
307 <p>You can also specify optional parameters:</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
308 <p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
309 <table cellspacing="0" border="0" cellpadding="2" class="simplelist_nottable_last" width="80%">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
310 <colgroup>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
311 <col width="25%"/>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
312 <col width="75%"/>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
313 </colgroup>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
314 <thead>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
315 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
316 <th class="subcategorylist">Key</th>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
317 <th class="subcategorylist">Description</th>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
318 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
319 </thead>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
320 <tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
321 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
322 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
323 <p>'gain'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
324 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
325 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
326 <p>The gain of the filter [default: 1]</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
327 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
328 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
329 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
330 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
331 <p>'fc'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
332 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
333 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
334 <p>The roll-off frequency [default: 0.1 Hz]</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
335 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
336 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
337 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
338 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
339 <p>'fs'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
340 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
341 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
342 <p>The sampling frequency to design for [default: 1 Hz]</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
343 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
344 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
345 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
346 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
347 <p>'order'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
348 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
349 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
350 <p>The filter order [default: 64]</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
351 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
352 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
353 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
354 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
355 <p>'win'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
356 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
357 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
358 <p>Specify window function used in filter design [default: 'Hamming']</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
359 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
360 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
361 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
362 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
363 <p>'iunits'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
364 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
365 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
366 <p>the input unit of the filter</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
367 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
368 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
369 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
370 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
371 <p>'ounits'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
372 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
373 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
374 <p>the output unit of the filter</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
375 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
376 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
377 </tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
378 </table>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
379 </p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
380 <p>The following example creates an order 64 highpass filter with high frequency gain 2. Filter is designed for 1 Hz sampled data and has a cut-off frequency of 0.2 Hz.</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
381 <div class="fragment"><pre class="programlisting">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
382 pl = plist(<span class="string">'type'</span>, <span class="string">'highpass'</span>, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
383 <span class="string">'order'</span>, 64, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
384 <span class="string">'gain'</span>, 2.0, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
385 <span class="string">'fs'</span>, 1, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
386 <span class="string">'fc'</span>, 0.2);
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
387 f = mfir(pl)
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
388 </pre></div>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
389 <p>Furthermore it is possible to specify a spectral window.</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
390 <div class="fragment"><pre class="programlisting">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
391 win = specwin(<span class="string">'Kaiser'</span>, 11, 150);
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
392 pl = plist(<span class="string">'type'</span>, <span class="string">'lowpass'</span>, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
393 <span class="string">'Win'</span>, win, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
394 <span class="string">'fs'</span>, 100, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
395 <span class="string">'fc'</span>, 20, ...
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
396 <span class="string">'order'</span>, 10);
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
397 f = mfir(pl)
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
398 </pre></div>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
399
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
400 <!-- --------------- NEXT EXAMPLE --------------- -->
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
401
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
402 <hr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
403 <h2 class="title"><a name="exist_model"></a>Construct a MFIR object from an existing filter</h2>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
404 <p>The mfir constructor also accepts as an input existing filters stored in different formats:</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
405 <p>LISO files</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
406 <div class="fragment"><pre class="programlisting">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
407 f = mfir(<span class="string">'foo_fir.fil'</span>)
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
408 </pre></div>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
409 <p>XML files</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
410 <div class="fragment"><pre class="programlisting">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
411 f = mfir(<span class="string">'foo_fir.xml'</span>)
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
412 </pre></div>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
413 <p>MAT files</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
414 <div class="fragment"><pre class="programlisting">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
415 f = mfir(<span class="string">'foo_fir.mat'</span>)
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
416 </pre></div>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
417 <p>From an LTPDA repository</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
418 <p>The relevant parameters for retrieving a FIR filter from a LTPDA repository are:</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
419 <p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
420 <table cellspacing="0" border="0" cellpadding="2" class="simplelist_nottable_last" width="80%">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
421 <colgroup>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
422 <col width="25%"/>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
423 <col width="75%"/>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
424 </colgroup>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
425 <thead>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
426 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
427 <th class="subcategorylist">Key</th>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
428 <th class="subcategorylist">Description</th>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
429 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
430 </thead>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
431 <tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
432 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
433 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
434 <p>'hostname'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
435 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
436 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
437 <p>the repository hostname. [default: 'localhost']</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
438 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
439 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
440 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
441 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
442 <p>'database'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
443 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
444 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
445 <p>The database name [default: 'ltpda']</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
446 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
447 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
448 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
449 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
450 <p>'id'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
451 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
452 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
453 <p>A vector of object IDs. [default: []]</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
454 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
455 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
456 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
457 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
458 <p>'cid'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
459 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
460 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
461 <p>Retrieve all rational objects from a particular collection</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
462 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
463 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
464 <tr valign="top">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
465 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
466 <p>'binary'</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
467 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
468 <td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
469 <p>Set to 'yes' to retrieve from stored binary representation (not always available). [default: yes]</p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
470 </td>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
471 </tr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
472 </tbody>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
473 </table>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
474 </p>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
475 <div class="fragment"><pre class="programlisting">
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
476 f = mfir(plist(<span class="string">'hostname'</span>, <span class="string">'localhost'</span>, <span class="string">'database'</span>, <span class="string">'ltpda'</span>, <span class="string">'ID'</span>, []))
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
477 </pre></div>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
478
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
479
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
480 <!-- --------------- NEXT EXAMPLE --------------- -->
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
481
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
482 <hr>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
483 <h2 class="title"><a name="equation"></a>Construct a MFIR object from a difference equation</h2>
f0afece42f48 Import.
Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
484 <p>The filter can be defined in terms of two vectors specifying the coefficients of the filter and the sampling frequency. The following example creates a FIR filter with sampling frequency 1 Hz and the following recursive equation:</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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485 <div align="center">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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486 <IMG src="images/sigproc_10.png" width="202" height="28" align="middle" border="0">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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487 </div>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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488 <div class="fragment"><pre class="programlisting">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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489 a = [-0.8 10];
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Daniele Nicolodi <nicolodi@science.unitn.it>
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490 fs = 1;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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491
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Daniele Nicolodi <nicolodi@science.unitn.it>
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492 f = mfir(a,fs)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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493 </pre></div>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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494 <p>or in a <tt>PLIST</tt></p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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495 <p>The relevant parameters are:</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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496 <p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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497 <table cellspacing="0" border="0" cellpadding="2" class="simplelist_nottable_last" width="80%">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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498 <colgroup>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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499 <col width="25%"/>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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500 <col width="75%"/>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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501 </colgroup>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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502 <thead>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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503 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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504 <th class="subcategorylist">Key</th>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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505 <th class="subcategorylist">Description</th>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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506 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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507 </thead>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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508 <tbody>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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509 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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510 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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511 <p>'a'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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512 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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513 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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514 <p>vector of A coefficients. (see note ** below) [default: empty]</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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515 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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516 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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517 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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518 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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519 <p>'fs'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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520 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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521 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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522 <p>sampling frequency of the filter [default: empty]</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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523 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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524 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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525 <tr valign="top">
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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526 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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527 <p>'name'</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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528 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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529 <td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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530 <p>name of filter [default: 'None']</p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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531 </td>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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532 </tr>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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533 </tbody>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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534 </table>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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535 </p>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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536 <div class="fragment"><pre class="programlisting">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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537 a = [-0.8 10];
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Daniele Nicolodi <nicolodi@science.unitn.it>
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538 fs = 1;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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539 pl = plist(<span class="string">'a'</span>, a, <span class="string">'fs'</span>, fs);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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540
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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541 fir = mfir(pl)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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542 </pre></div>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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543 <br></br>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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544 <div class="fragment">
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Daniele Nicolodi <nicolodi@science.unitn.it>
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545 NOTES:<br></br>
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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546 ** The convention used here for naming the filter coefficients is the opposite to MATLAB's convention. The recursion formula for this convention is<br></br>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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547 y(n) = a(1)*x(n) + a(2)*x(n-1) + ... + a(na+1)*x(n-na).
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Daniele Nicolodi <nicolodi@science.unitn.it>
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548 </div>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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549
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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550
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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551 <!-- ------------------------------------------------ -->
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Daniele Nicolodi <nicolodi@science.unitn.it>
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552 <!-- --------------- END CONTENT FILE --------------- -->
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Daniele Nicolodi <nicolodi@science.unitn.it>
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553 <!-- ------------------------------------------------ -->