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diff --git a/help/en_US/scilab_en_US_help/invfreqs.html b/help/en_US/scilab_en_US_help/invfreqs.html new file mode 100644 index 0000000..1903e7a --- /dev/null +++ b/help/en_US/scilab_en_US_help/invfreqs.html @@ -0,0 +1,99 @@ +<html><head> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> + <title>invfreqs</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="invfreq.html"><< invfreq</a></span> + + </td> + <td width="40%" class="center"> + <span class="top"><a href="section_cc2bc01c47967d47fcf3507a91d572ba.html">FOSSEE Signal Processing Toolbox</a></span> + + </td> + <td width="30%" class="next"> + <span class="next"><a href="invfreqz.html">invfreqz >></a></span> + + </td> + </tr></table> + <hr /> + </div> + + + + <span class="path"><a href="index.html">FOSSEE Signal Processing Toolbox</a> >> <a href="section_cc2bc01c47967d47fcf3507a91d572ba.html">FOSSEE Signal Processing Toolbox</a> > invfreqs</span> + + <br /><br /> + <div class="refnamediv"><h1 class="refname">invfreqs</h1> + <p class="refpurpose">Fit filter B(s)/A(s)to the complex frequency response H at frequency points F. A and B are real polynomial coefficients of order nA and nB.</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">C</span><span class="default">] = </span><span class="functionid">invfreqs</span><span class="default">(</span><span class="default">H</span><span class="default">,</span><span class="default">F</span><span class="default">,</span><span class="default">nB</span><span class="default">,</span><span class="default">nA</span><span class="default">,</span><span class="default">W</span><span class="default">,</span><span class="default">iter</span><span class="default">,</span><span class="default">tol</span><span class="default">,</span><span class="default">trace</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">C</span><span class="default">] = </span><span class="functionid">invfreqs</span><span class="default">(</span><span class="default">H</span><span class="default">,</span><span class="default">F</span><span class="default">,</span><span class="default">nB</span><span class="default">,</span><span class="default">nA</span><span class="default">,</span><span class="default">W</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">C</span><span class="default">] = </span><span class="functionid">invfreqs</span><span class="default">(</span><span class="default">H</span><span class="default">,</span><span class="default">F</span><span class="default">,</span><span class="default">nB</span><span class="default">,</span><span class="default">nA</span><span class="default">)</span></pre></div></div> + +<div class="refsection"><h3 class="title">Parameters</h3> + <dl><dt><span class="term">H:</span> + <dd><p class="para">desired complex frequency response.</p></dd></dt> + <dt><span class="term">F:</span> + <dd><p class="para">frequency (must be same length as H).</p></dd></dt> + <dt><span class="term">nB:</span> + <dd><p class="para">order of the numerator polynomial B.</p></dd></dt> + <dt><span class="term">nA:</span> + <dd><p class="para">order of the denominator polynomial A.</p></dd></dt> + <dt><span class="term">W:</span> + <dd><p class="para">vector of weights (must be same length as F).</p></dd></dt></dl></div> + +<div class="refsection"><h3 class="title">Description</h3> + <p class="para">This is an Octave function. +Fit filter B(s)/A(s)to the complex frequency response H at frequency points F. A and B are real polynomial coefficients of order nA and nB. +Optionally, the fit-errors can be weighted vs frequency according to the weights W. +Note: all the guts are in invfreq.m</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="scilabopenclose">[</span><span class="scilabnumber">1</span><span class="scilaboperator">/</span><span class="scilabnumber">2</span> <span class="scilabnumber">1</span><span class="scilabopenclose">]</span><span class="scilabdefault">;</span> +<span class="scilabid">A</span> <span class="scilaboperator">=</span> <span class="scilabopenclose">[</span><span class="scilabnumber">1</span> <span class="scilabnumber">1</span><span class="scilabopenclose">]</span><span class="scilabdefault">;</span> +<span class="scilabid">w</span> <span class="scilaboperator">=</span> <a class="scilabmacro" href="scilab://linspace">linspace</a><span class="scilabopenclose">(</span><span class="scilabnumber">0</span><span class="scilabdefault">,</span><span class="scilabnumber">4</span><span class="scilabdefault">,</span><span class="scilabnumber">128</span><span class="scilabopenclose">)</span><span class="scilabdefault">;</span> +<span class="scilabid">H</span> <span class="scilaboperator">=</span> <span class="scilabid">freqs</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="scilabid">w</span><span class="scilabopenclose">)</span><span class="scilabdefault">;</span> +<span class="scilabopenclose">[</span><span class="scilabid">Bh</span><span class="scilabdefault">,</span><span class="scilabid">Ah</span><span class="scilabdefault">,</span> <span class="scilabid">C</span><span class="scilabopenclose">]</span> <span class="scilaboperator">=</span> <span class="scilabid">invfreqs</span><span class="scilabopenclose">(</span><span class="scilabid">H</span><span class="scilabdefault">,</span><span class="scilabid">w</span><span class="scilabdefault">,</span><span class="scilabnumber">1</span><span class="scilabdefault">,</span><span class="scilabnumber">1</span><span class="scilabopenclose">)</span><span class="scilabdefault">;</span> +<span class="scilabid">Bh</span> <span class="scilaboperator">=</span> + +<span class="scilabnumber">0.50000</span> <span class="scilabnumber">1.00000</span> + +<span class="scilabid">Ah</span> <span class="scilaboperator">=</span> + +<span class="scilabnumber">1.0000</span> <span class="scilabnumber">1.0000</span> + +<span class="scilabid">C</span> <span class="scilaboperator">=</span> <span class="scilaboperator">-</span><span class="scilabnumber">3.0964e-15</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="invfreq.html"><< invfreq</a></span> + + </td> + <td width="40%" class="center"> + <span class="top"><a href="section_cc2bc01c47967d47fcf3507a91d572ba.html">FOSSEE Signal Processing Toolbox</a></span> + + </td> + <td width="30%" class="next"> + <span class="next"><a href="invfreqz.html">invfreqz >></a></span> + + </td> + </tr></table> + <hr /> + </div> + </body> +</html> |