Mercurial > hg > octave-nkf
annotate doc/interpreter/signal.txi @ 11542:695141f1c05c ss-3-3-55
snapshot 3.3.55
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sat, 15 Jan 2011 04:53:04 -0500 |
| parents | fd0a3ac60b0e |
| children | 72c96de7a403 |
| rev | line source |
|---|---|
| 11523 | 1 @c Copyright (C) 1996-2011 John W. Eaton |
| 7018 | 2 @c |
| 3 @c This file is part of Octave. | |
| 4 @c | |
| 5 @c Octave is free software; you can redistribute it and/or modify it | |
| 6 @c under the terms of the GNU General Public License as published by the | |
| 7 @c Free Software Foundation; either version 3 of the License, or (at | |
| 8 @c your option) any later version. | |
| 9 @c | |
| 10 @c Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 11 @c ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 @c FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 @c for more details. | |
| 14 @c | |
| 15 @c You should have received a copy of the GNU General Public License | |
| 16 @c along with Octave; see the file COPYING. If not, see | |
| 17 @c <http://www.gnu.org/licenses/>. | |
| 3294 | 18 |
| 4167 | 19 @node Signal Processing |
| 3294 | 20 @chapter Signal Processing |
| 21 | |
| 8828 | 22 |
|
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bd8e388043c4
Cleanup documentation for signal.texi, image.texi, audio.texi
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
23 This chapter describes the signal processing and fast Fourier |
|
bd8e388043c4
Cleanup documentation for signal.texi, image.texi, audio.texi
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
24 transform functions available in Octave. Fast Fourier transforms are |
|
bd8e388043c4
Cleanup documentation for signal.texi, image.texi, audio.texi
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
25 computed with the @sc{fftw} or @sc{fftpack} libraries depending on how |
| 8828 | 26 Octave is built. |
| 27 | |
| 28 | |
| 29 | |
| 3367 | 30 @DOCSTRING(detrend) |
| 3294 | 31 |
| 3367 | 32 @DOCSTRING(fft) |
| 3294 | 33 |
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9072
bd8e388043c4
Cleanup documentation for signal.texi, image.texi, audio.texi
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
34 Octave uses the @sc{fftw} libraries to perform FFT computations. When Octave |
|
bd8e388043c4
Cleanup documentation for signal.texi, image.texi, audio.texi
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
35 starts up and initializes the @sc{fftw} libraries, they read a system wide |
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7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
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diff
changeset
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36 file (on a Unix system, it is typically @file{/etc/fftw/wisdom}) that |
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7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
7018
diff
changeset
|
37 contains information useful to speed up FFT computations. This |
|
7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
7018
diff
changeset
|
38 information is called the @emph{wisdom}. The system-wide file allows |
|
9072
bd8e388043c4
Cleanup documentation for signal.texi, image.texi, audio.texi
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
39 wisdom to be shared between all applications using the @sc{fftw} libraries. |
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8426
7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
7018
diff
changeset
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40 |
|
7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
7018
diff
changeset
|
41 Use the @code{fftw} function to generate and save wisdom. Using the |
|
9072
bd8e388043c4
Cleanup documentation for signal.texi, image.texi, audio.texi
Rik <rdrider0-list@yahoo.com>
parents:
8920
diff
changeset
|
42 utilities provided together with the @sc{fftw} libraries |
|
8426
7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
7018
diff
changeset
|
43 (@command{fftw-wisdom} on Unix systems), you can even add wisdom |
|
7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
7018
diff
changeset
|
44 generated by Octave to the system-wide wisdom file. |
|
7523742aa026
Add explanation on what wisdom is.
Francesco Potortì <pot@gnu.org>
parents:
7018
diff
changeset
|
45 |
| 6549 | 46 @DOCSTRING(fftw) |
| 47 | |
| 3367 | 48 @DOCSTRING(ifft) |
| 3294 | 49 |
| 3367 | 50 @DOCSTRING(fft2) |
| 3294 | 51 |
| 3367 | 52 @DOCSTRING(ifft2) |
| 3294 | 53 |
| 4773 | 54 @DOCSTRING(fftn) |
| 55 | |
| 56 @DOCSTRING(ifftn) | |
| 57 | |
| 3367 | 58 @DOCSTRING(fftconv) |
| 3294 | 59 |
| 3367 | 60 @DOCSTRING(fftfilt) |
| 3294 | 61 |
| 3367 | 62 @DOCSTRING(filter) |
| 3294 | 63 |
| 6549 | 64 @DOCSTRING(filter2) |
| 65 | |
| 3367 | 66 @DOCSTRING(freqz) |
| 3294 | 67 |
| 3920 | 68 @DOCSTRING(freqz_plot) |
| 69 | |
| 3367 | 70 @DOCSTRING(sinc) |
| 3449 | 71 |
| 3920 | 72 @DOCSTRING(unwrap) |
| 73 | |
| 5775 | 74 @c FIXME -- someone needs to organize these... |
| 3449 | 75 |
| 76 @DOCSTRING(arch_fit) | |
| 77 | |
| 78 @DOCSTRING(arch_rnd) | |
| 79 | |
| 80 @DOCSTRING(arch_test) | |
| 81 | |
| 82 @DOCSTRING(arma_rnd) | |
| 83 | |
| 84 @DOCSTRING(autoreg_matrix) | |
| 85 | |
| 86 @DOCSTRING(bartlett) | |
| 87 | |
| 88 @DOCSTRING(blackman) | |
| 89 | |
| 90 @DOCSTRING(diffpara) | |
| 91 | |
| 92 @DOCSTRING(durbinlevinson) | |
| 93 | |
| 94 @DOCSTRING(fftshift) | |
| 95 | |
| 6549 | 96 @DOCSTRING(ifftshift) |
| 97 | |
| 3449 | 98 @DOCSTRING(fractdiff) |
| 99 | |
| 100 @DOCSTRING(hamming) | |
| 101 | |
| 102 @DOCSTRING(hanning) | |
| 103 | |
| 104 @DOCSTRING(hurst) | |
| 105 | |
| 6549 | 106 @DOCSTRING(pchip) |
| 107 | |
| 3449 | 108 @DOCSTRING(periodogram) |
| 109 | |
| 110 @DOCSTRING(rectangle_lw) | |
| 111 | |
| 112 @DOCSTRING(rectangle_sw) | |
| 113 | |
| 114 @DOCSTRING(sinetone) | |
| 115 | |
| 116 @DOCSTRING(sinewave) | |
| 117 | |
| 118 @DOCSTRING(spectral_adf) | |
| 119 | |
| 120 @DOCSTRING(spectral_xdf) | |
| 121 | |
| 122 @DOCSTRING(spencer) | |
| 123 | |
| 124 @DOCSTRING(stft) | |
| 125 | |
| 126 @DOCSTRING(synthesis) | |
| 127 | |
| 128 @DOCSTRING(triangle_lw) | |
| 129 | |
| 130 @DOCSTRING(triangle_sw) | |
| 131 | |
| 132 @DOCSTRING(yulewalker) |