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Add FFTW 3.3.8 source, and a Linux build
author Chris Cannam <cannam@all-day-breakfast.com>
date Tue, 19 Nov 2019 14:52:55 +0000
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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 3.3.8, 24 May 2018).
+
+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 6.3, http://www.gnu.org/software/texinfo/ -->
+<head>
+<title>FFTW 3.3.8: Tutorial</title>
+
+<meta name="description" content="FFTW 3.3.8: Tutorial">
+<meta name="keywords" content="FFTW 3.3.8: Tutorial">
+<meta name="resource-type" content="document">
+<meta name="distribution" content="global">
+<meta name="Generator" content="makeinfo">
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<link href="index.html#Top" rel="start" title="Top">
+<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="index.html#Top" rel="up" title="Top">
+<link href="Complex-One_002dDimensional-DFTs.html#Complex-One_002dDimensional-DFTs" rel="next" title="Complex One-Dimensional DFTs">
+<link href="Introduction.html#Introduction" rel="prev" title="Introduction">
+<style type="text/css">
+<!--
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+</style>
+
+
+</head>
+
+<body lang="en">
+<a name="Tutorial"></a>
+<div class="header">
+<p>
+Next: <a href="Other-Important-Topics.html#Other-Important-Topics" accesskey="n" rel="next">Other Important Topics</a>, Previous: <a href="Introduction.html#Introduction" accesskey="p" rel="prev">Introduction</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</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="Tutorial-1"></a>
+<h2 class="chapter">2 Tutorial</h2>
+<table class="menu" border="0" cellspacing="0">
+<tr><td align="left" valign="top">&bull; <a href="Complex-One_002dDimensional-DFTs.html#Complex-One_002dDimensional-DFTs" accesskey="1">Complex One-Dimensional DFTs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Complex-Multi_002dDimensional-DFTs.html#Complex-Multi_002dDimensional-DFTs" accesskey="2">Complex Multi-Dimensional DFTs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="One_002dDimensional-DFTs-of-Real-Data.html#One_002dDimensional-DFTs-of-Real-Data" accesskey="3">One-Dimensional DFTs of Real Data</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="Multi_002dDimensional-DFTs-of-Real-Data.html#Multi_002dDimensional-DFTs-of-Real-Data" accesskey="4">Multi-Dimensional DFTs of Real Data</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
+</td></tr>
+<tr><td align="left" valign="top">&bull; <a href="More-DFTs-of-Real-Data.html#More-DFTs-of-Real-Data" accesskey="5">More DFTs of Real Data</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
+</td></tr>
+</table>
+
+<p>This chapter describes the basic usage of FFTW, i.e., how to compute
+<a name="index-basic-interface-1"></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>
+<p>We recommend that you read this tutorial in order.<a name="DOCF1" href="#FOOT1"><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>
+<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>.
+</p>
+<div class="footnote">
+<hr>
+<h4 class="footnotes-heading">Footnotes</h4>
+
+<h3><a name="FOOT1" href="#DOCF1">(1)</a></h3>
+<p>You can
+read the tutorial in bit-reversed order after computing your first
+transform.</p>
+</div>
+
+
+
+</body>
+</html>