Mercurial > hg > ltpda
view m-toolbox/html_help/help/ug/constructor_examples_smodel_content.html @ 7:1e91f84a4be8 database-connection-manager
Make ltpda_up.retrieve work with java.sql.Connection objects
author | Daniele Nicolodi <nicolodi@science.unitn.it> |
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date | Mon, 05 Dec 2011 16:20:06 +0100 |
parents | f0afece42f48 |
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<!-- $Id: constructor_examples_smodel_content.html,v 1.1 2009/09/30 21:39:43 ingo Exp $ --> <!-- -------------------------------------------------- --> <!-- --------------- 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>