octave-nkf: libinterp/corefcn/fft.cc annotate

annotate libinterp/corefcn/fft.cc @ 20039:eba80000fa0d rc-4-0-0-2

maint: Bump version number for 4.0.0-rc2.

author	John W. Eaton <jwe@octave.org>
date	Fri, 20 Mar 2015 16:19:38 -0400
parents	4197fc428c7d
children	b2100e1659ac

rev	line source
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	1 /*
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	2
19731 4197fc428c7d maint: Update copyright notices for 2015. John W. Eaton <jwe@octave.org> parents: 17787 diff changeset	3 Copyright (C) 1997-2015 David Bateman
11523 fd0a3ac60b0e update copyright notices John W. Eaton <jwe@octave.org> parents: 10155 diff changeset	4 Copyright (C) 1996-1997 John W. Eaton
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	5
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	6 This file is part of Octave.
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	7
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	8 Octave is free software; you can redistribute it and/or modify it
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	9 under the terms of the GNU General Public License as published by the
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 7001 diff changeset	10 Free Software Foundation; either version 3 of the License, or (at your
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 7001 diff changeset	11 option) any later version.
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	12
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	13 Octave is distributed in the hope that it will be useful, but WITHOUT
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	16 for more details.
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	17
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	18 You should have received a copy of the GNU General Public License
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 7001 diff changeset	19 along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 7001 diff changeset	20 <http://www.gnu.org/licenses/>.
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	21
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	22 */
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	23
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	24 #ifdef HAVE_CONFIG_H
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	25 #include <config.h>
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	26 #endif
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	27
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	28 #include "lo-mappers.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	29
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	30 #include "defun.h"
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	31 #include "error.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	32 #include "gripes.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	33 #include "oct-obj.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	34 #include "utils.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	35
9523 0ce82753dd72 more configure changes for libraries John W. Eaton <jwe@octave.org> parents: 9072 diff changeset	36 #if defined (HAVE_FFTW)
9072 bd8e388043c4 Cleanup documentation for signal.texi, image.texi, audio.texi Rik <rdrider0-list@yahoo.com> parents: 9064 diff changeset	37 #define FFTSRC "@sc{fftw}"
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	38 #else
9072 bd8e388043c4 Cleanup documentation for signal.texi, image.texi, audio.texi Rik <rdrider0-list@yahoo.com> parents: 9064 diff changeset	39 #define FFTSRC "@sc{fftpack}"
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	40 #endif
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	41
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	42 static octave_value
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	43 do_fft (const octave_value_list &args, const char *fcn, int type)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	44 {
4233 ccfdb55c8156 [project @ 2002-12-20 22:43:54 by jwe] jwe parents: 3367 diff changeset	45 octave_value retval;
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	46
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	47 int nargin = args.length ();
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	48
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	49 if (nargin < 1 \|\| nargin > 3)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	50 {
5823 080c08b192d8 [project @ 2006-05-19 05:32:17 by jwe] jwe parents: 5642 diff changeset	51 print_usage ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	52 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	53 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	54
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	55 octave_value arg = args(0);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	56 dim_vector dims = arg.dims ();
5275 23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe] jwe parents: 4869 diff changeset	57 octave_idx_type n_points = -1;
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	58 int dim = -1;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	59
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	60 if (nargin > 1)
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	61 {
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	62 if (! args(1).is_empty ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	63 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	64 double dval = args(1).double_value ();
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	65 if (xisnan (dval))
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	66 error ("%s: number of points (N) cannot be NaN", fcn);
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	67 else
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	68 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	69 n_points = NINTbig (dval);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	70 if (n_points < 0)
17787 175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	71 error ("%s: number of points (N) must be greater than zero",
175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	72 fcn);
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	73 }
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	74 }
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	75 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	76
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	77 if (error_state)
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	78 return retval;
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	79
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	80 if (nargin > 2)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	81 {
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	82 double dval = args(2).double_value ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	83 if (xisnan (dval))
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	84 error ("%s: DIM cannot be NaN", fcn);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	85 else if (dval < 1 \|\| dval > dims.length ())
17787 175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	86 error ("%s: DIM must be a valid dimension along which to perform FFT",
175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	87 fcn);
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	88 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	89 // to be safe, cast it back to int since dim is an int
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	90 dim = NINT (dval) - 1;
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	91 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	92
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	93 if (error_state)
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	94 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	95
5275 23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe] jwe parents: 4869 diff changeset	96 for (octave_idx_type i = 0; i < dims.length (); i++)
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	97 if (dims(i) < 0)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	98 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	99
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	100 if (dim < 0)
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	101 {
5275 23b37da9fd5b [project @ 2005-04-08 16:07:35 by jwe] jwe parents: 4869 diff changeset	102 for (octave_idx_type i = 0; i < dims.length (); i++)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	103 if (dims(i) > 1)
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	104 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	105 dim = i;
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	106 break;
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	107 }
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	108
b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	109 // And if the first argument is scalar?
b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	110 if (dim < 0)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	111 dim = 1;
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	112 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	113
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	114 if (n_points < 0)
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	115 n_points = dims (dim);
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	116 else
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	117 dims (dim) = n_points;
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	118
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	119 if (dims.any_zero () \|\| n_points == 0)
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	120 {
4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	121 if (arg.is_single_type ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	122 return octave_value (FloatNDArray (dims));
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	123 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	124 return octave_value (NDArray (dims));
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	125 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	126
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	127 if (arg.is_single_type ())
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	128 {
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	129 if (arg.is_real_type ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	130 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	131 FloatNDArray nda = arg.float_array_value ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	132
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	133 if (! error_state)
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	134 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	135 nda.resize (dims, 0.0);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	136 retval = (type != 0 ? nda.ifourier (dim) : nda.fourier (dim));
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	137 }
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	138 }
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	139 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	140 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	141 FloatComplexNDArray cnda = arg.float_complex_array_value ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	142
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	143 if (! error_state)
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	144 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	145 cnda.resize (dims, 0.0);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	146 retval = (type != 0 ? cnda.ifourier (dim) : cnda.fourier (dim));
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	147 }
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	148 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	149 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	150 else
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	151 {
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	152 if (arg.is_real_type ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	153 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	154 NDArray nda = arg.array_value ();
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	155
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	156 if (! error_state)
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	157 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	158 nda.resize (dims, 0.0);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	159 retval = (type != 0 ? nda.ifourier (dim) : nda.fourier (dim));
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	160 }
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	161 }
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	162 else if (arg.is_complex_type ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	163 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	164 ComplexNDArray cnda = arg.complex_array_value ();
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	165
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	166 if (! error_state)
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	167 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	168 cnda.resize (dims, 0.0);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	169 retval = (type != 0 ? cnda.ifourier (dim) : cnda.fourier (dim));
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	170 }
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	171 }
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	172 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	173 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	174 gripe_wrong_type_arg (fcn, arg);
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	175 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	176 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	177
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	178 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	179 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	180
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	181 /*
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	182 %!assert (fft ([]), [])
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	183 %!assert (fft (zeros (10,0)), zeros (10,0))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	184 %!assert (fft (zeros (0,10)), zeros (0,10))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	185 %!assert (fft (0), 0)
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	186 %!assert (fft (1), 1)
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	187 %!assert (fft (ones (2,2)), [2,2; 0,0])
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	188 %!assert (fft (eye (2,2)), [1,1; 1,-1])
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	189
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	190 %!assert (fft (single ([])), single ([]))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	191 %!assert (fft (zeros (10,0,"single")), zeros (10,0,"single"))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	192 %!assert (fft (zeros (0,10,"single")), zeros (0,10,"single"))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	193 %!assert (fft (single (0)), single (0))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	194 %!assert (fft (single (1)), single (1))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	195 %!assert (fft (ones (2,2,"single")), single ([2,2; 0,0]))
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	196 %!assert (fft (eye (2,2,"single")), single ([1,1; 1,-1]))
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	197
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	198 %!error (fft ())
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	199 */
bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	200
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	201
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	202 DEFUN (fft, args, ,
17787 175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	203 "-- texinfo --\n\
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	204 @deftypefn {Built-in Function} {} fft (@var{x})\n\
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	205 @deftypefnx {Built-in Function} {} fft (@var{x}, @var{n})\n\
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	206 @deftypefnx {Built-in Function} {} fft (@var{x}, @var{n}, @var{dim})\n\
12160 b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	207 Compute the discrete Fourier transform of @var{A} using\n\
b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	208 a Fast Fourier Transform (FFT) algorithm.\n\
b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	209 \n\
b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	210 The FFT is calculated along the first non-singleton dimension of the\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	211 array. Thus if @var{x} is a matrix, @code{fft (@var{x})} computes the\n\
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	212 FFT for each column of @var{x}.\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	213 \n\
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	214 If called with two arguments, @var{n} is expected to be an integer\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	215 specifying the number of elements of @var{x} to use, or an empty\n\
9064 7c02ec148a3c Check grammar on all .cc files Rik <rdrider0-list@yahoo.com> parents: 8920 diff changeset	216 matrix to specify that its value should be ignored. If @var{n} is\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	217 larger than the dimension along which the FFT is calculated, then\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	218 @var{x} is resized and padded with zeros. Otherwise, if @var{n} is\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	219 smaller than the dimension along which the FFT is calculated, then\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	220 @var{x} is truncated.\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	221 \n\
5448 ebe5d7d15522 [project @ 2005-09-14 18:55:04 by jwe] jwe parents: 5307 diff changeset	222 If called with three arguments, @var{dim} is an integer specifying the\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	223 dimension of the matrix along which the FFT is performed\n\
6971 0a9d97cf2e13 [project @ 2007-10-07 19:44:53 by dbateman] dbateman parents: 6622 diff changeset	224 @seealso{ifft, fft2, fftn, fftw}\n\
5642 2618a0750ae6 [project @ 2006-03-06 21:26:48 by jwe] jwe parents: 5448 diff changeset	225 @end deftypefn")
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	226 {
4782 3dfdf6f36854 [project @ 2004-02-17 16:23:22 by jwe] jwe parents: 4773 diff changeset	227 return do_fft (args, "fft", 0);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	228 }
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	229
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	230
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	231 DEFUN (ifft, args, ,
17787 175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	232 "-- texinfo --\n\
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	233 @deftypefn {Built-in Function} {} ifft (@var{x})\n\
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	234 @deftypefnx {Built-in Function} {} ifft (@var{x}, @var{n})\n\
e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	235 @deftypefnx {Built-in Function} {} ifft (@var{x}, @var{n}, @var{dim})\n\
12160 b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	236 Compute the inverse discrete Fourier transform of @var{A}\n\
b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	237 using a Fast Fourier Transform (FFT) algorithm.\n\
b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	238 \n\
b64b82721062 Make documentation static by removing docstrings depending on #ifdef variables Rik <octave@nomad.inbox5.com> parents: 11586 diff changeset	239 The inverse FFT is calculated along the first non-singleton dimension\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	240 of the array. Thus if @var{x} is a matrix, @code{fft (@var{x})} computes\n\
01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	241 the inverse FFT for each column of @var{x}.\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	242 \n\
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	243 If called with two arguments, @var{n} is expected to be an integer\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	244 specifying the number of elements of @var{x} to use, or an empty\n\
9064 7c02ec148a3c Check grammar on all .cc files Rik <rdrider0-list@yahoo.com> parents: 8920 diff changeset	245 matrix to specify that its value should be ignored. If @var{n} is\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	246 larger than the dimension along which the inverse FFT is calculated, then\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	247 @var{x} is resized and padded with zeros. Otherwise, if @var{n} is\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	248 smaller than the dimension along which the inverse FFT is calculated,\n\
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	249 then @var{x} is truncated.\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	250 \n\
7001 8b0cfeb06365 [project @ 2007-10-10 18:02:59 by jwe] jwe parents: 6971 diff changeset	251 If called with three arguments, @var{dim} is an integer specifying the\n\
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	252 dimension of the matrix along which the inverse FFT is performed\n\
6971 0a9d97cf2e13 [project @ 2007-10-07 19:44:53 by dbateman] dbateman parents: 6622 diff changeset	253 @seealso{fft, ifft2, ifftn, fftw}\n\
5642 2618a0750ae6 [project @ 2006-03-06 21:26:48 by jwe] jwe parents: 5448 diff changeset	254 @end deftypefn")
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	255 {
4782 3dfdf6f36854 [project @ 2004-02-17 16:23:22 by jwe] jwe parents: 4773 diff changeset	256 return do_fft (args, "ifft", 1);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	257 }
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	258
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	259 /*
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	260 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	261 %% Comalco Research and Technology
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	262 %% 02 May 2000
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	263 %!test
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	264 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	265 %! n = 4;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	266 %! t = 2pi(0:1:N-1)/N;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	267 %! s = cos (n*t);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	268 %! S = fft (s);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	269 %!
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	270 %! answer = zeros (size (t));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	271 %! answer(n+1) = N/2;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	272 %! answer(N-n+1) = N/2;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	273 %!
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	274 %! assert (S, answer, 4Neps);
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	275
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	276 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	277 %% Comalco Research and Technology
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	278 %% 02 May 2000
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	279 %!test
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	280 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	281 %! n = 7;
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	282 %! t = 2pi(0:1:N-1)/N;
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	283 %! s = cos (n*t);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	284 %!
14854 5ae9f0f77635 maint: Use Octave coding conventions for coddling parenthis is DLD-FUNCTIONS directory Rik <octave@nomad.inbox5.com> parents: 14501 diff changeset	285 %! S = zeros (size (t));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	286 %! S(n+1) = N/2;
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	287 %! S(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	288 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	289 %! assert (ifft (S), s, 4Neps);
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	290
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	291 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	292 %% Comalco Research and Technology
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	293 %% 02 May 2000
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	294 %!test
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	295 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	296 %! n = 4;
7814 87865ed7405f Second set of single precision test code and fix of resulting bugs David Bateman <dbateman@free.fr> parents: 7789 diff changeset	297 %! t = single (2pi(0:1:N-1)/N);
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	298 %! s = cos (n*t);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	299 %! S = fft (s);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	300 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	301 %! answer = zeros (size (t), "single");
7814 87865ed7405f Second set of single precision test code and fix of resulting bugs David Bateman <dbateman@free.fr> parents: 7789 diff changeset	302 %! answer(n+1) = N/2;
87865ed7405f Second set of single precision test code and fix of resulting bugs David Bateman <dbateman@free.fr> parents: 7789 diff changeset	303 %! answer(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	304 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	305 %! assert (S, answer, 4Neps ("single"));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	306
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	307 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	308 %% Comalco Research and Technology
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	309 %% 02 May 2000
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	310 %!test
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	311 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	312 %! n = 7;
7814 87865ed7405f Second set of single precision test code and fix of resulting bugs David Bateman <dbateman@free.fr> parents: 7789 diff changeset	313 %! t = 2pi(0:1:N-1)/N;
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	314 %! s = cos (n*t);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	315 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	316 %! S = zeros (size (t), "single");
7814 87865ed7405f Second set of single precision test code and fix of resulting bugs David Bateman <dbateman@free.fr> parents: 7789 diff changeset	317 %! S(n+1) = N/2;
87865ed7405f Second set of single precision test code and fix of resulting bugs David Bateman <dbateman@free.fr> parents: 7789 diff changeset	318 %! S(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	319 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	320 %! assert (ifft (S), s, 4Neps ("single"));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	321 */

Mercurial > octave-nkf

annotate libinterp/corefcn/fft.cc @ 20039:eba80000fa0d rc-4-0-0-2