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Current fftw source
author Chris Cannam <cannam@all-day-breakfast.com>
date Tue, 18 Oct 2016 13:40:26 +0100
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cannam@127 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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cannam@127 3 <!-- This manual is for FFTW
cannam@127 4 (version 3.3.5, 30 July 2016).
cannam@127 5
cannam@127 6 Copyright (C) 2003 Matteo Frigo.
cannam@127 7
cannam@127 8 Copyright (C) 2003 Massachusetts Institute of Technology.
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cannam@127 24 <head>
cannam@127 25 <title>FFTW 3.3.5: Advanced Real-to-real Transforms</title>
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cannam@127 69 </head>
cannam@127 70
cannam@127 71 <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
cannam@127 72 <a name="Advanced-Real_002dto_002dreal-Transforms"></a>
cannam@127 73 <div class="header">
cannam@127 74 <p>
cannam@127 75 Previous: <a href="Advanced-Real_002ddata-DFTs.html#Advanced-Real_002ddata-DFTs" accesskey="p" rel="prev">Advanced Real-data DFTs</a>, Up: <a href="Advanced-Interface.html#Advanced-Interface" accesskey="u" rel="up">Advanced Interface</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
cannam@127 76 </div>
cannam@127 77 <hr>
cannam@127 78 <a name="Advanced-Real_002dto_002dreal-Transforms-1"></a>
cannam@127 79 <h4 class="subsection">4.4.3 Advanced Real-to-real Transforms</h4>
cannam@127 80
cannam@127 81 <div class="example">
cannam@127 82 <pre class="example">fftw_plan fftw_plan_many_r2r(int rank, const int *n, int howmany,
cannam@127 83 double *in, const int *inembed,
cannam@127 84 int istride, int idist,
cannam@127 85 double *out, const int *onembed,
cannam@127 86 int ostride, int odist,
cannam@127 87 const fftw_r2r_kind *kind, unsigned flags);
cannam@127 88 </pre></div>
cannam@127 89 <a name="index-fftw_005fplan_005fmany_005fr2r"></a>
cannam@127 90
cannam@127 91 <p>Like <code>fftw_plan_many_dft</code>, this functions adds <code>howmany</code>,
cannam@127 92 <code>nembed</code>, <code>stride</code>, and <code>dist</code> parameters to the
cannam@127 93 <code>fftw_plan_r2r</code> function, but otherwise behave the same as the
cannam@127 94 basic interface. The interpretation of those additional parameters are
cannam@127 95 the same as for <code>fftw_plan_many_dft</code>. (Of course, the
cannam@127 96 <code>stride</code> and <code>dist</code> parameters are now in units of
cannam@127 97 <code>double</code>, not <code>fftw_complex</code>.)
cannam@127 98 </p>
cannam@127 99 <p>Arrays <code>n</code>, <code>inembed</code>, <code>onembed</code>, and <code>kind</code> are not
cannam@127 100 used after this function returns. You can safely free or reuse them.
cannam@127 101 </p>
cannam@127 102
cannam@127 103
cannam@127 104
cannam@127 105 </body>
cannam@127 106 </html>