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diff --git a/help/en_US/scilab_en_US_help/invfreqz.html b/help/en_US/scilab_en_US_help/invfreqz.html deleted file mode 100644 index b7ac8bb..0000000 --- a/help/en_US/scilab_en_US_help/invfreqz.html +++ /dev/null @@ -1,97 +0,0 @@ -<html><head> - <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> - <title>invfreqz</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="invfreqs.html"><< invfreqs</a></span> - - </td> - <td width="40%" class="center"> - <span class="top"><a href="section_e54aa8aac34aa55341e8b4b782fe1a74.html">FOSSEE Signal Processing Toolbox</a></span> - - </td> - <td width="30%" class="next"> - <span class="next"><a href="invimpinvar.html">invimpinvar >></a></span> - - </td> - </tr></table> - <hr /> - </div> - - - - <span class="path"><a href="index.html">FOSSEE Signal Processing Toolbox</a> >> <a href="section_e54aa8aac34aa55341e8b4b782fe1a74.html">FOSSEE Signal Processing Toolbox</a> > invfreqz</span> - - <br /><br /> - <div class="refnamediv"><h1 class="refname">invfreqz</h1> - <p class="refpurpose">Fit filter B(z)/A(z)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">invfreqz</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">invfreqz</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">invfreqz</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(z)/A(z)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="scilabopenclose">[</span><span class="scilabid">B</span><span class="scilabdefault">,</span><span class="scilabid">A</span><span class="scilabopenclose">]</span> <span class="scilaboperator">=</span> <span class="scilabid">butter</span><span class="scilabopenclose">(</span><span class="scilabnumber">4</span><span class="scilabdefault">,</span><span class="scilabnumber">1</span><span class="scilaboperator">/</span><span class="scilabnumber">4</span><span class="scilabopenclose">)</span><span class="scilabdefault">;</span> -<span class="scilabopenclose">[</span><span class="scilabid">H</span><span class="scilabdefault">,</span><span class="scilabid">F</span><span class="scilabopenclose">]</span> <span class="scilaboperator">=</span> <span class="scilabid">freqz</span><span class="scilabopenclose">(</span><span class="scilabid">B</span><span class="scilabdefault">,</span><span class="scilabid">A</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">invfreq</span><span class="scilabopenclose">(</span><span class="scilabid">H</span><span class="scilabdefault">,</span><span class="scilabid">F</span><span class="scilabdefault">,</span><span class="scilabnumber">4</span><span class="scilabdefault">,</span><span class="scilabnumber">4</span><span class="scilabopenclose">)</span> -<span class="scilabid">Bh</span> <span class="scilaboperator">=</span> - -<span class="scilabnumber">0.010209</span> <span class="scilabnumber">0.040838</span> <span class="scilabnumber">0.061257</span> <span class="scilabnumber">0.040838</span> <span class="scilabnumber">0.010209</span> - -<span class="scilabid">Ah</span> <span class="scilaboperator">=</span> - -<span class="scilabnumber">1.00000</span> <span class="scilaboperator">-</span><span class="scilabnumber">1.96843</span> <span class="scilabnumber">1.73586</span> <span class="scilaboperator">-</span><span class="scilabnumber">0.72447</span> <span class="scilabnumber">0.12039</span> - -<span class="scilabid">C</span> <span class="scilaboperator">=</span> <span class="scilaboperator">-</span><span class="scilabnumber">7.7065e-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="invfreqs.html"><< invfreqs</a></span> - - </td> - <td width="40%" class="center"> - <span class="top"><a href="section_e54aa8aac34aa55341e8b4b782fe1a74.html">FOSSEE Signal Processing Toolbox</a></span> - - </td> - <td width="30%" class="next"> - <span class="next"><a href="invimpinvar.html">invimpinvar >></a></span> - - </td> - </tr></table> - <hr /> - </div> - </body> -</html> |