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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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166:cbd6d7e562c7 167:bd3cc4d1df30
1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
2 <html>
3 <!-- This manual is for FFTW
4 (version 3.3.8, 24 May 2018).
5
6 Copyright (C) 2003 Matteo Frigo.
7
8 Copyright (C) 2003 Massachusetts Institute of Technology.
9
10 Permission is granted to make and distribute verbatim copies of this
11 manual provided the copyright notice and this permission notice are
12 preserved on all copies.
13
14 Permission is granted to copy and distribute modified versions of this
15 manual under the conditions for verbatim copying, provided that the
16 entire resulting derived work is distributed under the terms of a
17 permission notice identical to this one.
18
19 Permission is granted to copy and distribute translations of this manual
20 into another language, under the above conditions for modified versions,
21 except that this permission notice may be stated in a translation
22 approved by the Free Software Foundation. -->
23 <!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
24 <head>
25 <title>FFTW 3.3.8: Tutorial</title>
26
27 <meta name="description" content="FFTW 3.3.8: Tutorial">
28 <meta name="keywords" content="FFTW 3.3.8: Tutorial">
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33 <link href="index.html#Top" rel="start" title="Top">
34 <link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
35 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
36 <link href="index.html#Top" rel="up" title="Top">
37 <link href="Complex-One_002dDimensional-DFTs.html#Complex-One_002dDimensional-DFTs" rel="next" title="Complex One-Dimensional DFTs">
38 <link href="Introduction.html#Introduction" rel="prev" title="Introduction">
39 <style type="text/css">
40 <!--
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65 </style>
66
67
68 </head>
69
70 <body lang="en">
71 <a name="Tutorial"></a>
72 <div class="header">
73 <p>
74 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>
75 </div>
76 <hr>
77 <a name="Tutorial-1"></a>
78 <h2 class="chapter">2 Tutorial</h2>
79 <table class="menu" border="0" cellspacing="0">
80 <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">
81 </td></tr>
82 <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">
83 </td></tr>
84 <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">
85 </td></tr>
86 <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">
87 </td></tr>
88 <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">
89 </td></tr>
90 </table>
91
92 <p>This chapter describes the basic usage of FFTW, i.e., how to compute
93 <a name="index-basic-interface-1"></a>
94 the Fourier transform of a single array. This chapter tells the
95 truth, but not the <em>whole</em> truth. Specifically, FFTW implements
96 additional routines and flags that are not documented here, although
97 in many cases we try to indicate where added capabilities exist. For
98 more complete information, see <a href="FFTW-Reference.html#FFTW-Reference">FFTW Reference</a>. (Note that you
99 need to compile and install FFTW before you can use it in a program.
100 For the details of the installation, see <a href="Installation-and-Customization.html#Installation-and-Customization">Installation and Customization</a>.)
101 </p>
102 <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
103 main interest lies in one of the other transform types.
104 </p>
105 <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>.
106 </p>
107 <div class="footnote">
108 <hr>
109 <h4 class="footnotes-heading">Footnotes</h4>
110
111 <h3><a name="FOOT1" href="#DOCF1">(1)</a></h3>
112 <p>You can
113 read the tutorial in bit-reversed order after computing your first
114 transform.</p>
115 </div>
116
117
118
119 </body>
120 </html>