Mercurial > hg > ltpda

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">

<html lang="en">
<head>
  <meta name="generator" content=
  "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org">
  <meta http-equiv="Content-Type" content=
  "text/html; charset=us-ascii">

  <title>Constructor examples of the SMODEL class (LTPDA Toolbox)</title>
  <link rel="stylesheet" href="docstyle.css" type="text/css">
  <meta name="generator" content="DocBook XSL Stylesheets V1.52.2">
  <meta name="description" content=
  "Presents an overview of the features, system requirements, and starting the toolbox.">
  </head>

<body>
  <a name="top_of_page" id="top_of_page"></a>

  <p style="font-size:1px;">&nbsp;</p>

  <table class="nav" summary="Navigation aid" border="0" width=
  "100%" cellpadding="0" cellspacing="0">
    <tr>
      <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td>

      <td valign="baseline" align="right"><a href=
      "constructor_examples_ao.html"><img src="b_prev.gif" border="0" align=
      "bottom" alt="Constructor examples of the AO class"></a>&nbsp;&nbsp;&nbsp;<a href=
      "constructor_examples_mfir.html"><img src="b_next.gif" border="0" align=
      "bottom" alt="Constructor examples of the MFIR class"></a></td>
    </tr>
  </table>

  <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Constructor examples of the SMODEL class</h1>
  <hr>

  <p>

<!-- -------------------------------------------------- -->
<!-- --------------- BEGIN CONTENT FILE --------------- -->
<!-- -------------------------------------------------- -->


<!-- --------------- Link box: begin --------------- -->
<table border="0" summary="Simple list" class="simplelist_nottable_last">
  <tr>
    <td>
      <a href="constructor_examples_general.html#copy">Copy a symbolic model object</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="constructor_examples_general.html#empty">Construct an empty symbolic model object</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="constructor_examples_general.html#zero">Construct an empty symbolic model object with the size zero</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="constructor_examples_general.html#file">Construct a symbolic model object by loading the object from a file</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="#simple">Construct a simple example</a>
    </td>
  </tr>
  <tr>
    <td>
      <a href="matlab:web(smodel.getInfo('smodel').tohtml, '-helpbrowser')">Construct an LTPDA object from a parameter list object (PLIST)</a>
    </td>
  </tr>
</table>

<!-- --------------- NEXT EXAMPLE --------------- -->

<hr>
<h2 class="title"><a name="simple"></a>A simple example</h2>
<p>The following example shows you how to create a symbolic model.</p>
<div class="fragment"><pre class="programlisting">
>> s = smodel(<span class="string">'a.*x.^2+b.*x+c'</span>);
</pre></div>
<p>You define with the command above the symbolic model. Please take care that each symbolic can represent a vector/matrix of numbers.
This mean that you should use the array operators like '.*' or '.+' or ... and not the matrix operators like '*' or '^' or ....</p>
<p>Now, it is necessary to define the parameters with their default values</p>
<div class="fragment"><pre class="programlisting">
>> s.setParams({<span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>}, {1 2 3})
   ---- symbolic model 1 ----
          name: None
          expr: a.*x.^2+b.*x+c
        params: {'a', 'b', 'c'}
        values: {1, 2, 3}
          xvar:
         xvals: []
        xunits: []
        yunits: []
   description:
          UUID: 7a084750-89c2-47f0-8c6b-65e9079bf6b3
   --------------------------
</pre></div>
<p>Finally it is necessary to set the 'x' variable and the values.</p>
<div class="fragment"><pre class="programlisting">
>> s.setXvar(<span class="string">'x'</span>)
   ---- symbolic model 1 ----
          name: None
          expr: a.*x.^2+b.*x+c
        params: {'a', 'b', 'c'}
        values: {1, 2, 3}
          xvar: x
         xvals: []
        xunits: []
        yunits: []
   description:
          UUID: ca9276b0-cc97-4001-9135-00c6799ec8b1
   --------------------------

>> s.setXvals(-100:100)
   ---- symbolic model 1 ----
          name: None
          expr: a.*x.^2+b.*x+c
        params: {'a', 'b', 'c'}
        values: {1, 2, 3}
          xvar: x
         xvals: [-100 -99 -98 -97 -96 -95 -94 -93 -92 -91 -90 -89 -88 -87 -86 ...]
        xunits: []
        yunits: []
   description:
          UUID: f43e2f9b-3fb6-4e3c-92ba-7cba31c6a6c3
   --------------------------
</pre></div>
<p>After all steps above it is possible to plot the model.</p>
<div class="fragment"><pre class="programlisting">
>> s.setXunits(<span class="string">'s'</span>);
>> s.setYunits(<span class="string">'V'</span>);
>> s.setName(<span class="string">'Just a test'</span>);
>> iplot(s.eval)
</pre></div>

<img src="images/constructor_examples_smodel_plot.png" alt="Plot of symbolic model" border="3" width="800px"></img>


  </p>

  <br>
  <br>
  <table class="nav" summary="Navigation aid" border="0" width=
  "100%" cellpadding="0" cellspacing="0">
    <tr valign="top">
      <td align="left" width="20"><a href="constructor_examples_ao.html"><img src=
      "b_prev.gif" border="0" align="bottom" alt=
      "Constructor examples of the AO class"></a>&nbsp;</td>

      <td align="left">Constructor examples of the AO class</td>

      <td>&nbsp;</td>

      <td align="right">Constructor examples of the MFIR class</td>

      <td align="right" width="20"><a href=
      "constructor_examples_mfir.html"><img src="b_next.gif" border="0" align=
      "bottom" alt="Constructor examples of the MFIR class"></a></td>
    </tr>
  </table><br>

  <p class="copy">&copy;LTP Team</p>
</body>
</html>
author	Daniele Nicolodi <nicolodi@science.unitn.it>
date	Wed, 07 Dec 2011 17:24:37 +0100
parents	f0afece42f48
children