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Clarify ltpda_uo.retrieve parameters handling
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>The pole/zero model helper (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 "gui_workspacebrowser.html"><img src="b_prev.gif" border="0" align=
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30 "bottom" alt="The LTPDA Workspace Browser"></a>&nbsp;&nbsp;&nbsp;<a href=
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31 "gui_specwin.html"><img src="b_next.gif" border="0" align=
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32 "bottom" alt="The Spectral Window GUI"></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>The pole/zero model helper</h1>
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37 <hr>
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38
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39 <p>
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40 <p>
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41 The LTPDA toolbox contains a class (<tt>pzmodel</tt>) for creating and using pole/zero models.
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42 The <it>pole/zero model helper GUI</it> allows the user to visualise the pole/zero model as it's
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43 being designed. It also allows the user to quickly see how the corresponding IIR filter
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44 (<tt>miir</tt> object) will look for different sample rates.
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45 </p>
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46 <p>
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47 To start the pole/zero model helper:
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48 <div class="fragment">
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49 <pre>
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50 >> pzmodel_helper
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51 </pre>
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52 </div>
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53 or click the appropriate button on the LTPDA Launch Bay.
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54 </p>
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55 <p>
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56 Once the GUI is loaded, you will see the following figure:
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57 </p>
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58 <br>
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59 <img src="images/pzmodel_helper.png" alt="pzmodel helper" border="3">
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60 <br>
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61 <p>
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62 You can add poles and zeros to the model by entering the frequency (and Q) in the edit boxes, then click
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63 <tt>Add pole</tt> or <tt>Add zero</tt> as appropriate. The response is then updated in the response axes.
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64 </p>
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65 <br>
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66 <img src="images/pzmodel_helper_eg1.png" alt="pzmodel helper" border="3">
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67 <br>
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68
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69
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70 </p>
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71
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72 <br>
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73 <br>
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74 <table class="nav" summary="Navigation aid" border="0" width=
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75 "100%" cellpadding="0" cellspacing="0">
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76 <tr valign="top">
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77 <td align="left" width="20"><a href="gui_workspacebrowser.html"><img src=
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78 "b_prev.gif" border="0" align="bottom" alt=
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79 "The LTPDA Workspace Browser"></a>&nbsp;</td>
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80
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81 <td align="left">The LTPDA Workspace Browser</td>
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82
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83 <td>&nbsp;</td>
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84
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85 <td align="right">The Spectral Window GUI</td>
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86
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87 <td align="right" width="20"><a href=
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88 "gui_specwin.html"><img src="b_next.gif" border="0" align=
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89 "bottom" alt="The Spectral Window GUI"></a></td>
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90 </tr>
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91 </table><br>
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92
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93 <p class="copy">&copy;LTP Team</p>
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94 </body>
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95 </html>