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Update ltpda_uo.update
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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2 "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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3
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4 <html lang="en">
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5 <head>
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6 <meta name="generator" content=
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7 "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org">
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8 <meta http-equiv="Content-Type" content=
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9 "text/html; charset=us-ascii">
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10
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11 <title>Applying digital filters to data (LTPDA Toolbox)</title>
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12 <link rel="stylesheet" href="docstyle.css" type="text/css">
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13 <meta name="generator" content="DocBook XSL Stylesheets V1.52.2">
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14 <meta name="description" content=
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15 "Presents an overview of the features, system requirements, and starting the toolbox.">
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16 </head>
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17
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18 <body>
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19 <a name="top_of_page" id="top_of_page"></a>
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20
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21 <p style="font-size:1px;">&nbsp;</p>
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22
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23 <table class="nav" summary="Navigation aid" border="0" width=
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24 "100%" cellpadding="0" cellspacing="0">
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25 <tr>
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26 <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td>
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27
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28 <td valign="baseline" align="right"><a href=
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29 "sigproc_filterbanks.html"><img src="b_prev.gif" border="0" align=
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30 "bottom" alt="Filter banks"></a>&nbsp;&nbsp;&nbsp;<a href=
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31 "sigproc_diff.html"><img src="b_next.gif" border="0" align=
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32 "bottom" alt="Discrete Derivative"></a></td>
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33 </tr>
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34 </table>
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35
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36 <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Applying digital filters to data</h1>
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37 <hr>
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38
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39 <p>
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40
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41 <!-- ================================================== -->
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42 <!-- BEGIN CONTENT FILE -->
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43 <!-- ================================================== -->
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44 <!-- ===== link box: Begin ===== -->
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45 <p>
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46 <table border="1" width="80%">
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47 <tr>
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48 <td>
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49 <table border="0" cellpadding="5" class="categorylist" width="100%">
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50 <colgroup>
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51 <col width="37%"/>
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52 <col width="63%"/>
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53 </colgroup>
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54 <tbody>
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55 <tr valign="top">
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56 <td>
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57 <a href="#Applyfiltdesc">Description</a>
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58 </td>
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59 <td>Digital filtering with LTPDA filters objects.</td>
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60 </tr>
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61 <tr valign="top">
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62 <td>
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63 <a href="#Applyfiltexample">Examples</a>
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64 </td>
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65 <td>How to filter a data series in LTPDA.</td>
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66 </tr>
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67 </tbody>
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68 </table>
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69 </td>
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70 </tr>
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71 </table>
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72 </p>
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73 <!-- ===== link box: End ====== -->
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74
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75
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76
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77 <!-- ===== filtering in LTPDA description ===== -->
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78 <h2><a name="Applyfiltdesc">Description</a></h2>
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79 <p>
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80 Digital filtering in LTPDA can be performed by a call to the <tt>ao/filter</tt> method.
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81 <tt>ao/filter</tt> method is a wrapper of the standard MATLAB filter method.
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82 Details of the core algorithm can be found in the proper
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83 <a href="matlab:doc('filter')">documentation page</a>.
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84 </p>
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85
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86
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87 <!-- ===== Examples ===== -->
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88
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89 <h2><a name="Applyfiltexample">Examples</a></h2>
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90 <p>
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91 Given an input analysis object (can be a time series or a frequency series object)
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92 <tt>a_in</tt>, digital filtering operation can be easily performed:
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93 </p>
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94
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95 <div class="fragment"><pre>
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96
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97 a_out = filter(a_in,fobj)
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98
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99 </pre></div>
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100
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101 <p>
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102 Where <tt>fobj</tt> is a filter. It can be a <a href="sigproc_iir.html">MIIR</a>,
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103 a <a href="sigproc_fir.html">MFIR</a>
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104 or a <a href="sigproc_filterbanks.html">FILTERBANK</a> object.
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105 </p>
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106 <p>
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107 The filter object <tt>fobj</tt> can be also embedded in a plist
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108 </p>
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109
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110 <div class="fragment"><pre>
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111
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112 pl = plist(<span class="string">'filter'</span>, fobj);
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113 a_out = filter(a_in,pl)
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114
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115 </pre></div>
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116
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117
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118
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119 </p>
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120
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121 <br>
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122 <br>
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123 <table class="nav" summary="Navigation aid" border="0" width=
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124 "100%" cellpadding="0" cellspacing="0">
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125 <tr valign="top">
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126 <td align="left" width="20"><a href="sigproc_filterbanks.html"><img src=
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127 "b_prev.gif" border="0" align="bottom" alt=
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128 "Filter banks"></a>&nbsp;</td>
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129
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130 <td align="left">Filter banks</td>
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131
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132 <td>&nbsp;</td>
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133
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134 <td align="right">Discrete Derivative</td>
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135
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136 <td align="right" width="20"><a href=
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137 "sigproc_diff.html"><img src="b_next.gif" border="0" align=
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138 "bottom" alt="Discrete Derivative"></a></td>
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139 </tr>
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140 </table><br>
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141
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142 <p class="copy">&copy;LTP Team</p>
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143 </body>
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144 </html>