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diff --git a/help/en_US/scilab_en_US_help/buttord.html b/help/en_US/scilab_en_US_help/buttord.html new file mode 100644 index 0000000..e8f28d7 --- /dev/null +++ b/help/en_US/scilab_en_US_help/buttord.html @@ -0,0 +1,91 @@ +<html><head> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> + <title>buttord</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="butter.html"><< butter</a></span> + + </td> + <td width="40%" class="center"> + <span class="top"><a href="section_be19baaac84b122b8ad501d34462f5bf.html">FOSSEE Signal Processing Toolbox</a></span> + + </td> + <td width="30%" class="next"> + <span class="next"><a href="cconv.html">cconv >></a></span> + + </td> + </tr></table> + <hr /> + </div> + + + + <span class="path"><a href="index.html">FOSSEE Signal Processing Toolbox</a> >> <a href="section_be19baaac84b122b8ad501d34462f5bf.html">FOSSEE Signal Processing Toolbox</a> > buttord</span> + + <br /><br /> + <div class="refnamediv"><h1 class="refname">buttord</h1> + <p class="refpurpose">/This function computes the minimum filter order of a Butterworth filter with the desired response characteristics.</p></div> + + +<div class="refsynopsisdiv"><h3 class="title">Calling Sequence</h3> + <div class="synopsis"><pre><span class="default">n</span><span class="default"> = </span><span class="functionid">buttord</span><span class="default">(</span><span class="default">Wp</span><span class="default">, </span><span class="default">Ws</span><span class="default">, </span><span class="default">Rp</span><span class="default">, </span><span class="default">Rs</span><span class="default">)</span> +<span class="default">[</span><span class="default">n</span><span class="default">, </span><span class="default">Wc</span><span class="default">] = </span><span class="functionid">buttord</span><span class="default">(</span><span class="default">Wp</span><span class="default">, </span><span class="default">Ws</span><span class="default">, </span><span class="default">Rp</span><span class="default">, </span><span class="default">Rs</span><span class="default">)</span></pre></div></div> + +<div class="refsection"><h3 class="title">Parameters</h3> + <dl><dt><span class="term">Wp:</span> + <dd><p class="para">scalar or vector of length 2</p></dd></dt> + <dt><span class="term">Ws:</span> + <dd><p class="para">scalar or vector of length 2, elements must be in the range [0,1]</p></dd></dt> + <dt><span class="term">Rp:</span> + <dd><p class="para">real or complex value</p></dd></dt> + <dt><span class="term">Rs:</span> + <dd><p class="para">real or complex value</p></dd></dt></dl></div> + +<div class="refsection"><h3 class="title">Description</h3> + <p class="para">This is an Octave function. +This function computes the minimum filter order of a Butterworth filter with the desired response characteristics. +The filter frequency band edges are specified by the passband frequency wp and stopband frequency ws. +Frequencies are normalized to the Nyquist frequency in the range [0,1]. +Rp is measured in decibels and is the allowable passband ripple, and Rs is also in decibels and is the minimum attenuation in the stop band. +If ws>wp, the filter is a low pass filter. If wp>ws, the filter is a high pass filter. +If wp and ws are vectors of length 2, then the passband interval is defined by wp the stopband interval is defined by ws. +If wp is contained within the lower and upper limits of ws, the filter is a band-pass filter. If ws is contained within the lower and upper limits of wp the filter is a band-stop or band-reject filter.</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">Wp</span> <span class="scilaboperator">=</span> <span class="scilabnumber">40</span><span class="scilaboperator">/</span><span class="scilabnumber">500</span> +<span class="scilabid">Ws</span> <span class="scilaboperator">=</span> <span class="scilabnumber">150</span><span class="scilaboperator">/</span><span class="scilabnumber">500</span> +<span class="scilabopenclose">[</span><span class="scilabid">n</span><span class="scilabdefault">,</span> <span class="scilabid">Wn</span><span class="scilabopenclose">]</span> <span class="scilaboperator">=</span> <span class="scilabid">buttord</span><span class="scilabopenclose">(</span><span class="scilabid">Wp</span><span class="scilabdefault">,</span> <span class="scilabid">Ws</span><span class="scilabdefault">,</span> <span class="scilabnumber">3</span><span class="scilabdefault">,</span> <span class="scilabnumber">60</span><span class="scilabopenclose">)</span> +<span class="scilabid">n</span> <span class="scilaboperator">=</span> <span class="scilabnumber">5</span> +<span class="scilabid">Wn</span> <span class="scilaboperator">=</span> <span class="scilabnumber">0.080038</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="butter.html"><< butter</a></span> + + </td> + <td width="40%" class="center"> + <span class="top"><a href="section_be19baaac84b122b8ad501d34462f5bf.html">FOSSEE Signal Processing Toolbox</a></span> + + </td> + <td width="30%" class="next"> + <span class="next"><a href="cconv.html">cconv >></a></span> + + </td> + </tr></table> + <hr /> + </div> + </body> +</html> |