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annotate m-toolbox/html_help/help/ug/parfrac_content.html @ 33:5e7477b94d94 database-connection-manager

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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
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1 <p>
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2 Transfer functions can be expressed as a quocient of polynomials
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3 </p>
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4 <br>
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5 <div align="center">
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6 <img src="images/parfrac_tf_eqn.png" alt="Pole/zero model TF" border="3">
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7 </div>
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8 <br>
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9 <p>
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10 The constructor can be used in different ways
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11 </p>
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12 <h2>From poles and residues</a></h2>
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13 <p>
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14 The standard way is to input the coefficients of your filter. The constructor
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15 accepts as a optional properties the name
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16 </p>
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17 <br>
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18 <div class="fragment"><pre>
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19 >> par = parfrac([1 2+1i 2-1i], [6 1+3i 1-3i], [])
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20 ---- parfrac 1 ----
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21 model: None
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22 res: [1;2+i*1;2-i*1]
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23 poles: [6;1+i*3;1-i*3]
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24 dir: 0
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25 pmul: [1;1;1]
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26 iunits: []
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27 ounits: []
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28 -------------------
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29 </pre></div>
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30 <br>
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31 <h2>From partial XML file</a></h2>
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32 You can input a XML file containing a transfer function model into the constructor
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33 <br>
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34 <div class="fragment"><pre>
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35 >> par = parfrac('datafile.xml')
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36 </pre></div>
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37 <br>
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38 <h2>From mat file</a></h2>
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39 You can input a mat file containing a transfer function model into the constructor
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40 <br>
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41 <div class="fragment"><pre>
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42 >> rat = parfrac('datafile.mat')
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43 </pre></div>
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44 <br>
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45 <h2>From plist</a></h2>
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46 All the properties of the filter can be specified in a plist and then passed to the constructor:
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47 <br>
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48 <div class="fragment"><pre>
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49 >> pl = plist('iunits','m','ounits','V','res',[1 2+1i 2-1i],'poles',[6 1+3i 1-3i],...
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50 'name','filter_mame');
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51 >> par = parfrac(pl)
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52 ---- parfrac 1 ----
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53 model: filter_mame
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54 res: [1;2+i*1;2-i*1]
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55 poles: [6;1+i*3;1-i*3]
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56 dir: 0
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57 pmul: [1;1;1]
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58 iunits: [m]
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59 ounits: [V]
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60 -------------------
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61 </pre></div>
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62 <br>
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63 <h2>From repository</a></h2>
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64 Rational transfer function can be obtained from the <a href="repo.html"> repository </a> with the following syntax.
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65 <br>
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66 <div class="fragment"><pre>
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67 >> rat = rational('Hostname','localhost','Database','ltpda',...
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68 'ID',[],'CID',[],'Binary',yes)
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69 </pre></div>
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70 <br>