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+ − 1 <!-- $Id: constructor_examples_param_content.html,v 1.4 2008/04/01 12:46:21 ingo Exp $ -->
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+ − 2
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+ − 3 <!-- -------------------------------------------------- -->
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+ − 4 <!-- --------------- BEGIN CONTENT FILE --------------- -->
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+ − 5 <!-- -------------------------------------------------- -->
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+ − 6
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+ − 7 <table border="0" summary="Simple list" class="simplelist_nottable_last">
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+ − 8 <tr>
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+ − 9 <td>
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+ − 10 <a href="constructor_examples_param.html#general">General Information of the PARAM object constructor</a>
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+ − 11 </td>
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+ − 12 </tr>
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+ − 13 <tr>
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+ − 14 <td>
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+ − 15 <a href="constructor_examples_param.html#empty">Construct empty PARAM object</a>
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+ − 16 </td>
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+ − 17 </tr>
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+ − 18 <tr>
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+ − 19 <td>
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+ − 20 <a href="constructor_examples_param.html#xml_file">Construct a PARAM object by loading the object from a file</a>
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+ − 21 </td>
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+ − 22 </tr>
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+ − 23 <tr>
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+ − 24 <td>
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+ − 25 <a href="constructor_examples_param.html#plist">Construct a PARAM object from a parameter list (PLIST) object</a>
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+ − 26 </td>
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+ − 27 </tr>
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+ − 28 </table>
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+ − 29
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+ − 30
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+ − 31 <!-- From parameters -->
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+ − 32 <hr>
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+ − 33 <h2 class="title"><a name="general"></a>General Information of the PARAM object constructor</h2>
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+ − 34 <p>
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+ − 35 Parameter objects are used in the LTPDA Toolbox to configure the behaviour of algorithms. A
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+ − 36 parameter (<tt>param</tt>) object has two main properties:
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+ − 37 <ul>
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+ − 38 <li><tt>'key'</tt> — The parameter name</li>
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+ − 39 <li><tt>'val'</tt> — The parameter value</li>
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+ − 40 </ul>
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+ − 41 See <a href="class_desc_param.html">param class</a> for further details. The 'key' property is always stored in upper case. The 'value' of a parameter can be any LTPDA object, as well as most standard MATLAB types.
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+ − 42 </p>
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+ − 43 <p>
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+ − 44 Parameter values can take any form: vectors or matrices of numbers; strings; other objects,
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+ − 45 for example a <tt>specwin</tt> (spectral window) object.
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+ − 46 </p>
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+ − 47 <p>
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+ − 48 Parameters are created using the <tt>param</tt> class constructor. The following code shows
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+ − 49 how to create a parameter 'a' with a value of 1
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+ − 50 </p>
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+ − 51 <div class="fragment"><pre>
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+ − 52 >> p = param(<span class="string">'a'</span>, 1)
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+ − 53 ---- param 1 ----
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+ − 54 key: a
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+ − 55 val: 1
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+ − 56 -----------------
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+ − 57 </pre></div>
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+ − 58 <p>
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+ − 59 The contents of a parmeter object can be accessed as follows:
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+ − 60 </p>
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+ − 61 <div class="fragment"><pre>
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+ − 62 >> key = p.key; <span class="comment">% get the parameter key</span>
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+ − 63 >> val = p.val; <span class="comment">% get the parameter value</span>
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+ − 64 </pre></div>
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+ − 65
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+ − 66 <!-- --------------- NEXT EXAMPLE --------------- -->
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+ − 67
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+ − 68 <hr>
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+ − 69 <h2 class="title"><a name="empty"></a>Construct empty PARAM object</h2>
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+ − 70 <p>The following example creates an empty param object</p>
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+ − 71 <div class="fragment"><pre class="programlisting">
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+ − 72 p = param()
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+ − 73 ---- param 1 ----
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+ − 74 key:
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+ − 75 val: []
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+ − 76 -----------------
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+ − 77 </pre></div>
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+ − 78
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+ − 79 <!-- --------------- NEXT EXAMPLE --------------- -->
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+ − 80
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+ − 81 <hr>
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+ − 82 <h2 class="title"><a name="xml_file"></a>Construct a PARAM object by loading the object from a file</h2>
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+ − 83 <p>The following example creates a new param object by loading the param object from disk.</p>
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+ − 84 <div class="fragment"><pre class="programlisting">
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+ − 85 p = param(<span class="string">'param.mat'</span>)
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+ − 86 p = param(<span class="string">'param.xml'</span>)
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+ − 87 </pre></div>
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+ − 88
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+ − 89 <!-- --------------- NEXT EXAMPLE --------------- -->
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+ − 90
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+ − 91 <hr>
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+ − 92 <h2 class="title"><a name="plist"></a>Construct a PARAM object from a parameter list (PLIST) object</h2>
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+ − 93 <p>To construct a PARAM object with a PLIST object it is necessarc to use the key-words 'key' and 'val'</p>
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+ − 94 <div class="fragment"><pre class="programlisting">
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+ − 95 pl = plist(<span class="string">'key'</span>, <span class="string">'my_key'</span>, <span class="string">'val'</span>, <span class="string">'my_value'</span>);
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+ − 96
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+ − 97 p = param(pl)
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+ − 98 </pre></div>
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+ − 99
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+ − 100 <!-- -------------------------------------------------- -->
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+ − 101 <!-- ---------------- END CONTENT FILE ---------------- -->
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+ − 102 <!-- -------------------------------------------------- -->