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Add FFTW3
author Chris Cannam
date Wed, 20 Mar 2013 15:35:50 +0000
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+<html lang="en">
+<head>
+<title>Tutorial - FFTW 3.3.3</title>
+<meta http-equiv="Content-Type" content="text/html">
+<meta name="description" content="FFTW 3.3.3">
+<meta name="generator" content="makeinfo 4.13">
+<link title="Top" rel="start" href="index.html#Top">
+<link rel="prev" href="Introduction.html#Introduction" title="Introduction">
+<link rel="next" href="Other-Important-Topics.html#Other-Important-Topics" title="Other Important Topics">
+<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
+<!--
+This manual is for FFTW
+(version 3.3.3, 25 November 2012).
+
+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.
+   -->
+<meta http-equiv="Content-Style-Type" content="text/css">
+<style type="text/css"><!--
+  pre.display { font-family:inherit }
+  pre.format  { font-family:inherit }
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+  span.sansserif { font-family:sans-serif; font-weight:normal; } 
+--></style>
+</head>
+<body>
+<div class="node">
+<a name="Tutorial"></a>
+<p>
+Next:&nbsp;<a rel="next" accesskey="n" href="Other-Important-Topics.html#Other-Important-Topics">Other Important Topics</a>,
+Previous:&nbsp;<a rel="previous" accesskey="p" href="Introduction.html#Introduction">Introduction</a>,
+Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
+<hr>
+</div>
+
+<h2 class="chapter">2 Tutorial</h2>
+
+<ul class="menu">
+<li><a accesskey="1" href="Complex-One_002dDimensional-DFTs.html#Complex-One_002dDimensional-DFTs">Complex One-Dimensional DFTs</a>
+<li><a accesskey="2" href="Complex-Multi_002dDimensional-DFTs.html#Complex-Multi_002dDimensional-DFTs">Complex Multi-Dimensional DFTs</a>
+<li><a accesskey="3" href="One_002dDimensional-DFTs-of-Real-Data.html#One_002dDimensional-DFTs-of-Real-Data">One-Dimensional DFTs of Real Data</a>
+<li><a accesskey="4" href="Multi_002dDimensional-DFTs-of-Real-Data.html#Multi_002dDimensional-DFTs-of-Real-Data">Multi-Dimensional DFTs of Real Data</a>
+<li><a accesskey="5" href="More-DFTs-of-Real-Data.html#More-DFTs-of-Real-Data">More DFTs of Real Data</a>
+</ul>
+
+<p>This chapter describes the basic usage of FFTW, i.e., how to compute
+<a name="index-basic-interface-14"></a>the Fourier transform of a single array.  This chapter tells the
+truth, but not the <em>whole</em> truth. Specifically, FFTW implements
+additional routines and flags that are not documented here, although
+in many cases we try to indicate where added capabilities exist.  For
+more complete information, see <a href="FFTW-Reference.html#FFTW-Reference">FFTW Reference</a>.  (Note that you
+need to compile and install FFTW before you can use it in a program. 
+For the details of the installation, see <a href="Installation-and-Customization.html#Installation-and-Customization">Installation and Customization</a>.)
+
+   <p>We recommend that you read this tutorial in order.<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a>  At the least, read the first section (see <a href="Complex-One_002dDimensional-DFTs.html#Complex-One_002dDimensional-DFTs">Complex One-Dimensional DFTs</a>) before reading any of the others, even if your
+main interest lies in one of the other transform types.
+
+   <p>Users of FFTW version 2 and earlier may also want to read <a href="Upgrading-from-FFTW-version-2.html#Upgrading-from-FFTW-version-2">Upgrading from FFTW version 2</a>.
+
+<!--  -->
+   <div class="footnote">
+<hr>
+<h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> You can
+read the tutorial in bit-reversed order after computing your first
+transform.</p>
+
+   <hr></div>
+
+   </body></html>
+