55 lines
4.8 KiB
HTML
55 lines
4.8 KiB
HTML
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<!doctype html><html lang='en'><head><title>WalshHadamard | SuperCollider 3.9.3 Help</title>
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<link rel='stylesheet' href='./../scdoc.css' type='text/css' />
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<meta http-equiv='Content-Type' content='text/html; charset=UTF-8' />
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<script>
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var helpRoot = './..';
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var scdoc_title = 'WalshHadamard';
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var scdoc_sc_version = '3.9.3';
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</head>
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<body onload='fixTOC();prettyPrint()'>
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<div id='toc'>
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<div id='toctitle'>WalshHadamard:</div>
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<span class='toc_search'>Filter: <input id='toc_search'></span><ul class='toc'><li class='toc1'><a href='#description'>Description</a></li>
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<ul class='toc'></ul><li class='toc1'><a href='#classmethods'>Class methods</a></li>
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<ul class='toc'><li class='toc3'><a href='#*ar'>ar</a> </li>
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<li class='toc2'><a href='#Inherited%20class%20methods'>Inherited class methods</a></li>
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</ul><li class='toc1'><a href='#instancemethods'>Instance methods</a></li>
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<ul class='toc'><li class='toc2'><a href='#Inherited%20instance%20methods'>Inherited instance methods</a></li>
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</ul><li class='toc1'><a href='#examples'>Examples</a></li>
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<ul class='toc'></ul></ul></div><div class='contents'>
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<div id='menubar'></div>
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<div class='header'>
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<div id='label'>
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<span id='folder'>Classes (extension)</span>
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| <span id='categories'><a href='./../Browse.html#UGens'>UGens</a> > <a href='./../Browse.html#UGens>Analysis'>Analysis</a></span>
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</div><h1>WalshHadamard<span id='superclasses'> : <a href="../Classes/UGen.html">UGen</a> : <a href="../Classes/AbstractFunction.html">AbstractFunction</a> : <a href="../Classes/Object.html">Object</a></span>
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<div class='extension-indicator-ctr' title='This help file originates from a third-party quark or plugin for SuperCollider.'><img class='extension-indicator-icon' alt='Extension' src='./../images/plugin.png'><span class='extension-indicator-text'>Extension</span></div></h1>
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<div id='summary'>decomposition into square waves, and reconstruction</div>
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</div>
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<div class='subheader'>
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<div id='filename'>Source: <a href='file:///Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/classes/WalshHadamard.sc' title='/Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/classes/WalshHadamard.sc'>WalshHadamard.sc</a></div><div id='related'>See also: <a href="./../Classes/WaveletDaub.html">WaveletDaub</a></div>
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</div>
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<h2><a class='anchor' name='description'>Description</a></h2>
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<p>WalshHadamard transform to a basis of square wave like functions rather than the more conventional sine waves of Fourier analysis. The advantage is that the transform is really efficient (no need for trigonometric functions) but the interpretation in a space of 'sequencies' and amplitudes is less intuitively comprehensible.
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<p>The plug-in demonstrates the transform in the context of a filter; choose how many of the 64 basis elements to use in the reconstruction. 64 corresponds to the standard block size.<h2><a class='anchor' name='classmethods'>Class Methods</a></h2>
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<h3 class='method-code'><span class='method-prefix'>WalshHadamard.</span><a class='method-name' name='*ar' href='./../Overviews/Methods.html#ar'>ar</a>(<span class='argstr'>input</span>, <span class='argstr'>which: 0</span>, <span class='argstr'>mul: 1</span>, <span class='argstr'>add: 0</span>)</h3>
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<div class='method'>
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<p><h4>Arguments:</h4>
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<table class='arguments'>
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<tr><td class='argumentname'>input<td class='argumentdesc'>
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<p>Original signal to effect<tr><td class='argumentname'>which<td class='argumentdesc'>
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<p>Basis elements whose Indices are below this number will be zeroed. The default 0 means the identity transform, all basis elements will be used in the reconstruction.</table></div><h3><a class='anchor' name='Inherited%20class%20methods'>Inherited class methods</a></h3>
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<div id='inheritedclassmets'></div><h2><a class='anchor' name='instancemethods'>Instance Methods</a></h2>
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<h3><a class='anchor' name='Inherited%20instance%20methods'>Inherited instance methods</a></h3>
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<div id='inheritedinstmets'></div><h2><a class='anchor' name='examples'>Examples</a></h2>
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<pre class='code prettyprint lang-sc'>{WalshHadamard.ar(SoundIn.ar, MouseX.kr(0,64))}.play</pre>
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<p><div class='doclink'>helpfile source: <a href='file:///Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/HelpSource/Classes/WalshHadamard.schelp'>/Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/HelpSource/Classes/WalshHadamard.schelp</a><br>link::Classes/WalshHadamard::<br></div></div></body></html>
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