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+<html><head>
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+ <title>invimpinvar</title>
+ <style type="text/css" media="all">
+ @import url("scilab_code.css");
+ @import url("xml_code.css");
+ @import url("c_code.css");
+ @import url("style.css");
+ </style>
+ </head>
+ <body>
+ <div class="manualnavbar">
+ <table width="100%"><tr>
+ <td width="30%">
+ <span class="previous"><a href="invfreqz.html">&lt;&lt; invfreqz</a></span>
+
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+ <td width="40%" class="center">
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+
+
+ <span class="path"><a href="index.html">FOSSEE Signal Processing Toolbox</a> &gt;&gt; <a href="section_cc2bc01c47967d47fcf3507a91d572ba.html">FOSSEE Signal Processing Toolbox</a> &gt; invimpinvar</span>
+
+ <br /><br />
+ <div class="refnamediv"><h1 class="refname">invimpinvar</h1>
+ <p class="refpurpose">This function converts digital filter with coefficients b and a to analog, conserving impulse response.</p></div>
+
+
+<div class="refsynopsisdiv"><h3 class="title">Calling Sequence</h3>
+ <div class="synopsis"><pre><span class="default">[</span><span class="default">b</span><span class="default">, </span><span class="default">a</span><span class="default">] = </span><span class="default">impinvar</span><span class="default"> (</span><span class="default">b</span><span class="default">, </span><span class="default">a</span><span class="default">)</span>
+<span class="default">[</span><span class="default">b</span><span class="default">, </span><span class="default">a</span><span class="default">] = </span><span class="default">impinvar</span><span class="default"> (</span><span class="default">b</span><span class="default">, </span><span class="default">a</span><span class="default">, </span><span class="default">fs</span><span class="default">)</span>
+<span class="default">[</span><span class="default">b</span><span class="default">, </span><span class="default">a</span><span class="default">] = </span><span class="default">impinvar</span><span class="default"> (</span><span class="default">b</span><span class="default">, </span><span class="default">a</span><span class="default">, </span><span class="default">fs</span><span class="default">, </span><span class="default">tol</span><span class="default">)</span></pre></div></div>
+
+<div class="refsection"><h3 class="title">Parameters</h3>
+ <dl><dt><span class="term">b:</span>
+ <dd><p class="para">real or complex valued scalar or vector</p></dd></dt>
+ <dt><span class="term">a:</span>
+ <dd><p class="para">real or complex valued scalar or vector, order should be greater than b</p></dd></dt>
+ <dt><span class="term">fs:</span>
+ <dd><p class="para">real or complex value, default value 1Hz</p></dd></dt>
+ <dt><span class="term">tol:</span>
+ <dd><p class="para">real or complex value, default value 0.0001</p></dd></dt></dl></div>
+
+<div class="refsection"><h3 class="title">Description</h3>
+ <p class="para">This is an Octave function.
+This function converts digital filter with coefficients b and a to analog, conserving impulse response.
+This function does the inverse of impinvar.</p></div>
+
+<div class="refsection"><h3 class="title">Examples</h3>
+ <div class="programlisting"><table border="0" width="100%"><tr><td width="98%"><pre class="scilabcode"><span class="scilabid">b</span> <span class="scilaboperator">=</span> <span class="scilabnumber">0.0081000</span>
+<span class="scilabid">a</span> <span class="scilaboperator">=</span> <span class="scilabopenclose">[</span><span class="scilabnumber">2.0000000</span><span class="scilabdefault">,</span> <span class="scilabnumber">0.56435378</span><span class="scilabdefault">,</span> <span class="scilabnumber">0.4572792</span><span class="scilabdefault">,</span> <span class="scilabnumber">0.00705544</span><span class="scilabdefault">,</span> <span class="scilabnumber">0.091000</span><span class="scilabopenclose">]</span>
+<span class="scilabopenclose">[</span><span class="scilabid">ay</span><span class="scilabdefault">,</span> <span class="scilabid">by</span><span class="scilabopenclose">]</span> <span class="scilaboperator">=</span> <span class="scilabid">invimpinvar</span><span class="scilabopenclose">(</span><span class="scilabid">b</span><span class="scilabdefault">,</span><span class="scilabid">a</span><span class="scilabdefault">,</span><span class="scilabnumber">10</span><span class="scilabopenclose">)</span>
+<span class="scilabid">ay</span> <span class="scilaboperator">=</span>
+<span class="scilaboperator">-</span><span class="scilabnumber">1.6940e-16</span> <span class="scilabnumber">4.6223e+00</span> <span class="scilaboperator">-</span><span class="scilabnumber">4.5210e+00</span> <span class="scilabnumber">7.2880e+02</span>
+<span class="scilabid">by</span> <span class="scilaboperator">=</span>
+<span class="scilabid">Columns</span> <span class="scilabnumber">1</span> <span class="scilabid">through</span> <span class="scilabnumber">4</span><span class="scilabspecial">:</span>
+<span class="scilabnumber">1.0000e+00</span> <span class="scilabnumber">3.0900e+01</span> <span class="scilabnumber">9.6532e+02</span> <span class="scilabnumber">1.2232e+04</span>
+<span class="scilabid">Column</span> <span class="scilabnumber">5</span><span class="scilabspecial">:</span>
+<span class="scilabnumber">1.1038e+05</span></pre></td><td valign="top"><a href="scilab://scilab.execexample/"><img src="ScilabExecute.png" border="0"/></a></td><td valign="top"><a href="scilab://scilab.editexample/"><img src="ScilabEdit.png" border="0"/></a></td><td></td></tr></table></div></div>
+ <br />
+
+ <div class="manualnavbar">
+ <table width="100%">
+ <tr><td colspan="3" class="next"><a href="http://bugzilla.scilab.org/enter_bug.cgi?product=Scilab%20software&component=Documentation%20pages" class="ulink">Report an issue</a></td></tr>
+<tr>
+ <td width="30%">
+ <span class="previous"><a href="invfreqz.html">&lt;&lt; invfreqz</a></span>
+
+ </td>
+ <td width="40%" class="center">
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+
+ </td>
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+
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