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Current fftw source
author Chris Cannam
date Tue, 18 Oct 2016 13:40:26 +0100
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+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<!-- This manual is for FFTW
+(version 3.3.5, 30 July 2016).
+
+Copyright (C) 2003 Matteo Frigo.
+
+Copyright (C) 2003 Massachusetts Institute of Technology.
+
+Permission is granted to make and distribute verbatim copies of this
+manual provided the copyright notice and this permission notice are
+preserved on all copies.
+
+Permission is granted to copy and distribute modified versions of this
+manual under the conditions for verbatim copying, provided that the
+entire resulting derived work is distributed under the terms of a
+permission notice identical to this one.
+
+Permission is granted to copy and distribute translations of this manual
+into another language, under the above conditions for modified versions,
+except that this permission notice may be stated in a translation
+approved by the Free Software Foundation. -->
+<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
+<head>
+<title>FFTW 3.3.5: Advanced Real-to-real Transforms</title>
+
+<meta name="description" content="FFTW 3.3.5: Advanced Real-to-real Transforms">
+<meta name="keywords" content="FFTW 3.3.5: Advanced Real-to-real Transforms">
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+<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Advanced-Interface.html#Advanced-Interface" rel="up" title="Advanced Interface">
+<link href="Guru-Interface.html#Guru-Interface" rel="next" title="Guru Interface">
+<link href="Advanced-Real_002ddata-DFTs.html#Advanced-Real_002ddata-DFTs" rel="prev" title="Advanced Real-data DFTs">
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+<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
+<a name="Advanced-Real_002dto_002dreal-Transforms"></a>
+<div class="header">
+<p>
+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>
+</div>
+<hr>
+<a name="Advanced-Real_002dto_002dreal-Transforms-1"></a>
+<h4 class="subsection">4.4.3 Advanced Real-to-real Transforms</h4>
+
+<div class="example">
+<pre class="example">fftw_plan fftw_plan_many_r2r(int rank, const int *n, int howmany,
+                             double *in, const int *inembed,
+                             int istride, int idist,
+                             double *out, const int *onembed,
+                             int ostride, int odist,
+                             const fftw_r2r_kind *kind, unsigned flags);
+</pre></div>
+<a name="index-fftw_005fplan_005fmany_005fr2r"></a>
+
+<p>Like <code>fftw_plan_many_dft</code>, this functions adds <code>howmany</code>,
+<code>nembed</code>, <code>stride</code>, and <code>dist</code> parameters to the
+<code>fftw_plan_r2r</code> function, but otherwise behave the same as the
+basic interface.  The interpretation of those additional parameters are
+the same as for <code>fftw_plan_many_dft</code>.  (Of course, the
+<code>stride</code> and <code>dist</code> parameters are now in units of
+<code>double</code>, not <code>fftw_complex</code>.)
+</p>
+<p>Arrays <code>n</code>, <code>inembed</code>, <code>onembed</code>, and <code>kind</code> are not
+used after this function returns.  You can safely free or reuse them.
+</p>
+
+
+
+</body>
+</html>