octave: libinterp/corefcn/fft.cc annotate

annotate libinterp/corefcn/fft.cc @ 27919:1891570abac8

update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2020.

author	John W. Eaton <jwe@octave.org>
date	Mon, 06 Jan 2020 22:29:51 -0500
parents	b442ec6dda5c
children	bd51beb6205e

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
27919 1891570abac8 update Octave Project Developers copyright for the new year John W. Eaton <jwe@octave.org> parents: 27918 diff changeset	3 Copyright (C) 1996-2020 The Octave Project Developers
27918 b442ec6dda5c use centralized file for copyright info for individual contributors John W. Eaton <jwe@octave.org> parents: 26376 diff changeset	4
b442ec6dda5c use centralized file for copyright info for individual contributors John W. Eaton <jwe@octave.org> parents: 26376 diff changeset	5 See the file COPYRIGHT.md in the top-level directory of this distribution
b442ec6dda5c use centralized file for copyright info for individual contributors John W. Eaton <jwe@octave.org> parents: 26376 diff changeset	6 or <https://octave.org/COPYRIGHT.html/>.
b442ec6dda5c use centralized file for copyright info for individual contributors John W. Eaton <jwe@octave.org> parents: 26376 diff changeset	7
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	8
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	9 This file is part of Octave.
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	10
24534 194eb4bd202b maint: Update punctuation for GPL v3 license text. Rik <rik@octave.org> parents: 23582 diff changeset	11 Octave is free software: you can redistribute it and/or modify it
22755 3a2b891d0b33 maint: Standardize Copyright formatting. Rik <rik@octave.org> parents: 22701 diff changeset	12 under the terms of the GNU General Public License as published by
24534 194eb4bd202b maint: Update punctuation for GPL v3 license text. Rik <rik@octave.org> parents: 23582 diff changeset	13 the Free Software Foundation, either version 3 of the License, or
22755 3a2b891d0b33 maint: Standardize Copyright formatting. Rik <rik@octave.org> parents: 22701 diff changeset	14 (at your option) any later version.
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	15
22755 3a2b891d0b33 maint: Standardize Copyright formatting. Rik <rik@octave.org> parents: 22701 diff changeset	16 Octave is distributed in the hope that it will be useful, but
3a2b891d0b33 maint: Standardize Copyright formatting. Rik <rik@octave.org> parents: 22701 diff changeset	17 WITHOUT ANY WARRANTY; without even the implied warranty of
3a2b891d0b33 maint: Standardize Copyright formatting. Rik <rik@octave.org> parents: 22701 diff changeset	18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3a2b891d0b33 maint: Standardize Copyright formatting. Rik <rik@octave.org> parents: 22701 diff changeset	19 GNU General Public License for more details.
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	20
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	21 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	22 along with Octave; see the file COPYING. If not, see
24534 194eb4bd202b maint: Update punctuation for GPL v3 license text. Rik <rik@octave.org> parents: 23582 diff changeset	23 <https://www.gnu.org/licenses/>.
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	24
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	25 */
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	26
21724 aba2e6293dd8 use "#if ..." consistently instead of "#ifdef" and "#ifndef" John W. Eaton <jwe@octave.org> parents: 21660 diff changeset	27 #if defined (HAVE_CONFIG_H)
21301 40de9f8f23a6 Use '#include "config.h"' rather than <config.h>. Rik <rik@octave.org> parents: 21200 diff changeset	28 # include "config.h"
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	29 #endif
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	30
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	31 #include "lo-mappers.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	32
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	33 #include "defun.h"
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	34 #include "error.h"
21100 e39e05d90788 Switch gripe_XXX to either err_XXX or warn_XXX naming scheme. Rik <rik@octave.org> parents: 20940 diff changeset	35 #include "errwarn.h"
20940 48b2ad5ee801 maint: Rename oct-obj.[cc\|h] to ovl.[cc\|h] for clarity. Rik <rik@octave.org> parents: 20918 diff changeset	36 #include "ovl.h"
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	37 #include "utils.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	38
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	39 static octave_value
23433 c9fab0bc983e maint: Use convention 'int& x' for naming references. Rik <rik@octave.org> parents: 23220 diff changeset	40 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	41 {
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	42 int nargin = args.length ();
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	43
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	44 if (nargin < 1 \|\| nargin > 3)
20802 8bb38ba1bad6 eliminate return statements after calls to print_usage John W. Eaton <jwe@octave.org> parents: 20555 diff changeset	45 print_usage ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	46
20918 6f0bd96f93c0 maint: Use new C++ archetype in more files. Rik <rik@octave.org> parents: 20853 diff changeset	47 octave_value retval;
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	48 octave_value arg = args(0);
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	49 octave_idx_type n_points = -1;
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	50 dim_vector dims = arg.dims ();
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	51 int ndims = dims.ndims ();
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	52 int dim = -1;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	53
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	54 if (nargin > 1)
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	55 {
23577 80c42f4cca13 maint: Deprecate is_empty and replace with isempty. Rik <rik@octave.org> parents: 23433 diff changeset	56 if (! args(1).isempty ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	57 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	58 double dval = args(1).double_value ();
21782 2aef506f3fec use namespace for lo-mappers.h functions John W. Eaton <jwe@octave.org> parents: 21724 diff changeset	59 if (octave::math::isnan (dval))
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	60 error ("%s: number of points (N) cannot be NaN", fcn);
20918 6f0bd96f93c0 maint: Use new C++ archetype in more files. Rik <rik@octave.org> parents: 20853 diff changeset	61
21782 2aef506f3fec use namespace for lo-mappers.h functions John W. Eaton <jwe@octave.org> parents: 21724 diff changeset	62 n_points = octave::math::nint_big (dval);
20918 6f0bd96f93c0 maint: Use new C++ archetype in more files. Rik <rik@octave.org> parents: 20853 diff changeset	63 if (n_points < 0)
6f0bd96f93c0 maint: Use new C++ archetype in more files. Rik <rik@octave.org> parents: 20853 diff changeset	64 error ("%s: number of points (N) must be greater than zero", fcn);
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	65 }
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	66 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	67
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	68 if (nargin > 2)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	69 {
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	70 double dval = args(2).double_value ();
21782 2aef506f3fec use namespace for lo-mappers.h functions John W. Eaton <jwe@octave.org> parents: 21724 diff changeset	71 if (octave::math::isnan (dval))
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	72 error ("%s: DIM cannot be NaN", fcn);
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	73 else if (dval < 1 \|\| dval > ndims)
17787 175b392e91fe Use GNU style coding conventions for code in libinterp/ Rik <rik@octave.org> parents: 17744 diff changeset	74 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	75 fcn);
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	76 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	77 // to be safe, cast it back to int since dim is an int
21782 2aef506f3fec use namespace for lo-mappers.h functions John W. Eaton <jwe@octave.org> parents: 21724 diff changeset	78 dim = octave::math::nint (dval) - 1;
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	79 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	80
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	81 // FIXME: This seems strange and unnecessary (10/21/16).
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	82 // How would you ever arrive at an octave_value object without correct dims?
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	83 // We certainly don't make this check every other place in Octave.
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	84 for (octave_idx_type i = 0; i < ndims; i++)
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	85 if (dims(i) < 0)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	86 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	87
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	88 if (dim < 0)
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	89 {
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	90 dim = dims.first_non_singleton ();
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	91
b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	92 // And if the first argument is scalar?
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	93 if (dim == ndims)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	94 dim = 1;
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	95 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	96
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	97 if (n_points < 0)
20218 b2100e1659ac maint: Use cuddled parentheses when indexing dimension_vectors. Rik <rik@octave.org> parents: 19697 diff changeset	98 n_points = dims(dim);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	99 else
20218 b2100e1659ac maint: Use cuddled parentheses when indexing dimension_vectors. Rik <rik@octave.org> parents: 19697 diff changeset	100 dims(dim) = n_points;
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	101
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	102 if (n_points == 0 \|\| dims.any_zero ())
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	103 {
4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	104 if (arg.is_single_type ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	105 return octave_value (FloatNDArray (dims));
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	106 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	107 return octave_value (NDArray (dims));
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	108 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	109
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	110 if (n_points == 1)
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	111 {
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	112 octave_value_list idx (ndims);
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	113 for (octave_idx_type i = 0; i < ndims; i++)
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	114 idx(i) = idx_vector::colon;
22701 8e71fd674bcf maint: libinterp/corefcn/fft.cc: minor style fixes for C++ code. Kai T. Ohlhus <k.ohlhus@gmail.com> parents: 22700 diff changeset	115 idx(dim) = idx_vector (static_cast<octave_idx_type> (0));
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	116
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	117 return arg.do_index_op (idx);
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	118 }
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	119
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	120 if (arg.is_single_type ())
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	121 {
23582 0cc2011d800e maint: Deprecate is_real_type and replace with isreal. Rik <rik@octave.org> parents: 23581 diff changeset	122 if (arg.isreal ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	123 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	124 FloatNDArray nda = arg.float_array_value ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	125
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	126 nda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	127 retval = (type != 0 ? nda.ifourier (dim) : nda.fourier (dim));
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	128 }
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	129 else
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 FloatComplexNDArray cnda = arg.float_complex_array_value ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	132
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	133 cnda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	134 retval = (type != 0 ? cnda.ifourier (dim) : cnda.fourier (dim));
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	135 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	136 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	137 else
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	138 {
23582 0cc2011d800e maint: Deprecate is_real_type and replace with isreal. Rik <rik@octave.org> parents: 23581 diff changeset	139 if (arg.isreal ())
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 NDArray nda = arg.array_value ();
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	142
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	143 nda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	144 retval = (type != 0 ? nda.ifourier (dim) : nda.fourier (dim));
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	145 }
23581 c3075ae020e1 maint: Deprecate is_complex_type and replace with iscomplex. Rik <rik@octave.org> parents: 23577 diff changeset	146 else if (arg.iscomplex ())
10154 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 ComplexNDArray cnda = arg.complex_array_value ();
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	149
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	150 cnda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	151 retval = (type != 0 ? cnda.ifourier (dim) : cnda.fourier (dim));
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	152 }
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	153 else
21100 e39e05d90788 Switch gripe_XXX to either err_XXX or warn_XXX naming scheme. Rik <rik@octave.org> parents: 20940 diff changeset	154 err_wrong_type_arg (fcn, arg);
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	155 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	156
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	157 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	158 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	159
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	160 /*
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	161 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	162 %! assert (fft ([]), [])
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	163 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	164 %! assert (fft (zeros (10,0)), zeros (10,0))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	165 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	166 %! assert (fft (zeros (0,10)), zeros (0,10))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	167 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	168 %! assert (fft (0), 0)
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	169 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	170 %! assert (fft (1), 1)
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	171 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	172 %! assert (fft (ones (2,2)), [2,2; 0,0])
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	173 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	174 %! 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	175
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	176 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	177 %! assert (fft (single ([])), single ([]))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	178 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	179 %! assert (fft (zeros (10,0,"single")), zeros (10,0,"single"))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	180 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	181 %! assert (fft (zeros (0,10,"single")), zeros (0,10,"single"))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	182 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	183 %! assert (fft (single (0)), single (0))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	184 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	185 %! assert (fft (single (1)), single (1))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	186 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	187 %! assert (fft (ones (2,2,"single")), single ([2,2; 0,0]))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	188 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	189 %! 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	190
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	191 %!error (fft ())
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	192 */
bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	193
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	194
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	195 DEFUN (fft, args, ,
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	196 doc: /* -- texinfo --
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	197 @deftypefn {} {} fft (@var{x})
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	198 @deftypefnx {} {} fft (@var{x}, @var{n})
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	199 @deftypefnx {} {} fft (@var{x}, @var{n}, @var{dim})
24575 93714122ed59 doc: Fixes for signal, image, audio, and OOP chapters (bug #52844). Rik <rik@octave.org> parents: 23219 diff changeset	200 Compute the discrete Fourier transform of @var{x} using
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	201 a Fast Fourier Transform (FFT) algorithm.
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	202
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	203 The FFT is calculated along the first non-singleton dimension of the
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	204 array. Thus if @var{x} is a matrix, @code{fft (@var{x})} computes the
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	205 FFT for each column of @var{x}.
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	206
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	207 If called with two arguments, @var{n} is expected to be an integer
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	208 specifying the number of elements of @var{x} to use, or an empty
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	209 matrix to specify that its value should be ignored. If @var{n} is
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	210 larger than the dimension along which the FFT is calculated, then
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	211 @var{x} is resized and padded with zeros. Otherwise, if @var{n} is
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	212 smaller than the dimension along which the FFT is calculated, then
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	213 @var{x} is truncated.
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	214
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	215 If called with three arguments, @var{dim} is an integer specifying the
24575 93714122ed59 doc: Fixes for signal, image, audio, and OOP chapters (bug #52844). Rik <rik@octave.org> parents: 23219 diff changeset	216 dimension of the matrix along which the FFT is performed.
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	217 @seealso{ifft, fft2, fftn, fftw}
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	218 @end deftypefn */)
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	219 {
4782 3dfdf6f36854 [project @ 2004-02-17 16:23:22 by jwe] jwe parents: 4773 diff changeset	220 return do_fft (args, "fft", 0);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	221 }
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	222
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	223
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	224 DEFUN (ifft, args, ,
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	225 doc: /* -- texinfo --
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	226 @deftypefn {} {} ifft (@var{x})
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	227 @deftypefnx {} {} ifft (@var{x}, @var{n})
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	228 @deftypefnx {} {} ifft (@var{x}, @var{n}, @var{dim})
24575 93714122ed59 doc: Fixes for signal, image, audio, and OOP chapters (bug #52844). Rik <rik@octave.org> parents: 23219 diff changeset	229 Compute the inverse discrete Fourier transform of @var{x}
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	230 using a Fast Fourier Transform (FFT) algorithm.
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	231
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	232 The inverse FFT is calculated along the first non-singleton dimension
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	233 of the array. Thus if @var{x} is a matrix, @code{fft (@var{x})} computes
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	234 the inverse FFT for each column of @var{x}.
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	235
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	236 If called with two arguments, @var{n} is expected to be an integer
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	237 specifying the number of elements of @var{x} to use, or an empty
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	238 matrix to specify that its value should be ignored. If @var{n} is
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	239 larger than the dimension along which the inverse FFT is calculated, then
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	240 @var{x} is resized and padded with zeros. Otherwise, if @var{n} is
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	241 smaller than the dimension along which the inverse FFT is calculated,
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	242 then @var{x} is truncated.
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	243
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	244 If called with three arguments, @var{dim} is an integer specifying the
24575 93714122ed59 doc: Fixes for signal, image, audio, and OOP chapters (bug #52844). Rik <rik@octave.org> parents: 23219 diff changeset	245 dimension of the matrix along which the inverse FFT is performed.
21966 112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	246 @seealso{fft, ifft2, ifftn, fftw}
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	247 @end deftypefn */)
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	248 {
4782 3dfdf6f36854 [project @ 2004-02-17 16:23:22 by jwe] jwe parents: 4773 diff changeset	249 return do_fft (args, "ifft", 1);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	250 }
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	251
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	252 /*
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	253 ## Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	254 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	255 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	256 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	257 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	258 %! n = 4;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	259 %! 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	260 %! s = cos (n*t);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	261 %! S = fft (s);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	262 %!
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	263 %! answer = zeros (size (t));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	264 %! 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	265 %! 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	266 %!
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	267 %! assert (S, answer, 4Neps);
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	268
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	269 ## Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	270 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	271 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	272 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	273 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	274 %! n = 7;
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	275 %! 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	276 %! s = cos (n*t);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	277 %!
14854 5ae9f0f77635 maint: Use Octave coding conventions for coddling parenthis is DLD-FUNCTIONS directory Rik <octave@nomad.inbox5.com> parents: 14501 diff changeset	278 %! S = zeros (size (t));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	279 %! S(n+1) = N/2;
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	280 %! S(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	281 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	282 %! assert (ifft (S), s, 4Neps);
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	283
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	284 ## Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	285 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	286 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	287 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	288 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	289 %! 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	290 %! 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	291 %! s = cos (n*t);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	292 %! S = fft (s);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	293 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	294 %! 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	295 %! 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	296 %! answer(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	297 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	298 %! assert (S, answer, 4Neps ("single"));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	299
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	300 ## Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	301 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	302 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	303 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	304 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	305 %! 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	306 %! 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	307 %! s = cos (n*t);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	308 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	309 %! 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	310 %! 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	311 %! S(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	312 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	313 %! assert (ifft (S), s, 4Neps ("single"));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	314 */

Mercurial > octave

annotate libinterp/corefcn/fft.cc @ 27919:1891570abac8