octave: libinterp/corefcn/fft.cc annotate

annotate libinterp/corefcn/fft.cc @ 31210:9ad55d2e1bbf stable

Make sure we don't pass short 8.3 path to latex on Windows (bug #62779). * latex-text-renderer.cc (latex_renderer::write_tex_file): On Windows, use canonicalized path of temporary directory.

author	Pantxo Diribarne <pantxo.diribarne@gmail.com>
date	Sun, 28 Aug 2022 22:44:49 +0200
parents	796f54d4ddbf
children	32d2b6604a9f

rev	line source
27923 bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	1 ////////////////////////////////////////////////////////////////////////
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	2 //
30564 796f54d4ddbf update Octave Project Developers copyright for the new year John W. Eaton <jwe@octave.org> parents: 29961 diff changeset	3 // Copyright (C) 1996-2022 The Octave Project Developers
27923 bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	4 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	5 // See the file COPYRIGHT.md in the top-level directory of this
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	6 // distribution or <https://octave.org/copyright/>.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	7 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	8 // This file is part of Octave.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	9 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	10 // Octave is free software: you can redistribute it and/or modify it
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	11 // under the terms of the GNU General Public License as published by
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	12 // the Free Software Foundation, either version 3 of the License, or
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	13 // (at your option) any later version.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	14 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	15 // Octave is distributed in the hope that it will be useful, but
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	16 // WITHOUT ANY WARRANTY; without even the implied warranty of
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	18 // GNU General Public License for more details.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	19 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	20 // You should have received a copy of the GNU General Public License
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	21 // along with Octave; see the file COPYING. If not, see
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	22 // <https://www.gnu.org/licenses/>.
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	23 //
bd51beb6205e update formatting of copyright notices John W. Eaton <jwe@octave.org> parents: 27919 diff changeset	24 ////////////////////////////////////////////////////////////////////////
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	25
21724 aba2e6293dd8 use "#if ..." consistently instead of "#ifdef" and "#ifndef" John W. Eaton <jwe@octave.org> parents: 21660 diff changeset	26 #if defined (HAVE_CONFIG_H)
21301 40de9f8f23a6 Use '#include "config.h"' rather than <config.h>. Rik <rik@octave.org> parents: 21200 diff changeset	27 # include "config.h"
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	28 #endif
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	29
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	30 #include "lo-mappers.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	31
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	32 #include "defun.h"
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	33 #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	34 #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	35 #include "ovl.h"
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	36 #include "utils.h"
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	37
29958 32c3a5805893 move DEFUN and DEFMETHOD functions inside octave namespace John W. Eaton <jwe@octave.org> parents: 29688 diff changeset	38 OCTAVE_NAMESPACE_BEGIN
32c3a5805893 move DEFUN and DEFMETHOD functions inside octave namespace John W. Eaton <jwe@octave.org> parents: 29688 diff changeset	39
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	40 static octave_value
23433 c9fab0bc983e maint: Use convention 'int& x' for naming references. Rik <rik@octave.org> parents: 23220 diff changeset	41 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	42 {
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	43 int nargin = args.length ();
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	44
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	45 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	46 print_usage ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	47
20918 6f0bd96f93c0 maint: Use new C++ archetype in more files. Rik <rik@octave.org> parents: 20853 diff changeset	48 octave_value retval;
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	49 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	50 octave_idx_type n_points = -1;
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	51 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	52 int ndims = dims.ndims ();
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	53 int dim = -1;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	54
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	55 if (nargin > 1)
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	56 {
23577 80c42f4cca13 maint: Deprecate is_empty and replace with isempty. Rik <rik@octave.org> parents: 23433 diff changeset	57 if (! args(1).isempty ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	58 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	59 double dval = args(1).double_value ();
29961 7d6709900da7 eliminate octave:: namespace tags in DEFUN and DEFMETHOD and more John W. Eaton <jwe@octave.org> parents: 29958 diff changeset	60 if (math::isnan (dval))
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	61 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	62
29961 7d6709900da7 eliminate octave:: namespace tags in DEFUN and DEFMETHOD and more John W. Eaton <jwe@octave.org> parents: 29958 diff changeset	63 n_points = math::nint_big (dval);
20918 6f0bd96f93c0 maint: Use new C++ archetype in more files. Rik <rik@octave.org> parents: 20853 diff changeset	64 if (n_points < 0)
6f0bd96f93c0 maint: Use new C++ archetype in more files. Rik <rik@octave.org> parents: 20853 diff changeset	65 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	66 }
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	67 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	68
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	69 if (nargin > 2)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	70 {
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	71 double dval = args(2).double_value ();
29961 7d6709900da7 eliminate octave:: namespace tags in DEFUN and DEFMETHOD and more John W. Eaton <jwe@octave.org> parents: 29958 diff changeset	72 if (math::isnan (dval))
11553 01f703952eff Improve docstrings for functions in DLD-FUNCTIONS directory. Rik <octave@nomad.inbox5.com> parents: 11523 diff changeset	73 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	74 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	75 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	76 fcn);
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	77 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	78 // to be safe, cast it back to int since dim is an int
29961 7d6709900da7 eliminate octave:: namespace tags in DEFUN and DEFMETHOD and more John W. Eaton <jwe@octave.org> parents: 29958 diff changeset	79 dim = math::nint (dval) - 1;
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	80 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	81
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	82 // 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	83 // 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	84 // 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	85 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	86 if (dims(i) < 0)
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	87 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	88
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	89 if (dim < 0)
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	90 {
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	91 dim = dims.first_non_singleton ();
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	92
b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	93 // 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	94 if (dim == ndims)
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	95 dim = 1;
4869 b92d59213e63 [project @ 2004-04-21 17:03:02 by jwe] jwe parents: 4782 diff changeset	96 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	97
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	98 if (n_points < 0)
20218 b2100e1659ac maint: Use cuddled parentheses when indexing dimension_vectors. Rik <rik@octave.org> parents: 19697 diff changeset	99 n_points = dims(dim);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	100 else
20218 b2100e1659ac maint: Use cuddled parentheses when indexing dimension_vectors. Rik <rik@octave.org> parents: 19697 diff changeset	101 dims(dim) = n_points;
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	102
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	103 if (n_points == 0 \|\| dims.any_zero ())
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	104 {
4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	105 if (arg.is_single_type ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	106 return octave_value (FloatNDArray (dims));
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	107 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	108 return octave_value (NDArray (dims));
7924 4976f66d469b miscellaneous cleanup John W. Eaton <jwe@octave.org> parents: 7814 diff changeset	109 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	110
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	111 if (n_points == 1)
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	112 {
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	113 octave_value_list idx (ndims);
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	114 for (octave_idx_type i = 0; i < ndims; i++)
29961 7d6709900da7 eliminate octave:: namespace tags in DEFUN and DEFMETHOD and more John W. Eaton <jwe@octave.org> parents: 29958 diff changeset	115 idx(i) = idx_vector::colon;
7d6709900da7 eliminate octave:: namespace tags in DEFUN and DEFMETHOD and more John W. Eaton <jwe@octave.org> parents: 29958 diff changeset	116 idx(dim) = idx_vector (0);
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	117
28631 70cdf8de553d move non-member octave_value operator functions to octave namespace John W. Eaton <jwe@octave.org> parents: 27923 diff changeset	118 return arg.index_op (idx);
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	119 }
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	120
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	121 if (arg.is_single_type ())
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	122 {
23582 0cc2011d800e maint: Deprecate is_real_type and replace with isreal. Rik <rik@octave.org> parents: 23581 diff changeset	123 if (arg.isreal ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	124 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	125 FloatNDArray nda = arg.float_array_value ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	126
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	127 nda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	128 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	129 }
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	130 else
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	131 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	132 FloatComplexNDArray cnda = arg.float_complex_array_value ();
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	133
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	134 cnda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	135 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	136 }
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	137 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	138 else
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	139 {
23582 0cc2011d800e maint: Deprecate is_real_type and replace with isreal. Rik <rik@octave.org> parents: 23581 diff changeset	140 if (arg.isreal ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	141 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	142 NDArray nda = arg.array_value ();
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	143
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	144 nda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	145 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	146 }
23581 c3075ae020e1 maint: Deprecate is_complex_type and replace with iscomplex. Rik <rik@octave.org> parents: 23577 diff changeset	147 else if (arg.iscomplex ())
10154 40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	148 {
40dfc0c99116 DLD-FUNCTIONS/.cc: untabify John W. Eaton <jwe@octave.org>* parents: 9523 diff changeset	149 ComplexNDArray cnda = arg.complex_array_value ();
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	150
20555 f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	151 cnda.resize (dims, 0.0);
f90c8372b7ba eliminate many more simple uses of error_state John W. Eaton <jwe@octave.org> parents: 20218 diff changeset	152 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	153 }
7789 82be108cc558 First attempt at single precision tyeps David Bateman <dbateman@free.fr> parents: 7562 diff changeset	154 else
21100 e39e05d90788 Switch gripe_XXX to either err_XXX or warn_XXX naming scheme. Rik <rik@octave.org> parents: 20940 diff changeset	155 err_wrong_type_arg (fcn, arg);
2928 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
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	158 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	159 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	160
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	161 /*
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	162 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	163 %! assert (fft ([]), [])
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	164 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	165 %! assert (fft (zeros (10,0)), zeros (10,0))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	166 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	167 %! assert (fft (zeros (0,10)), zeros (0,10))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	168 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	169 %! assert (fft (0), 0)
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	170 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	171 %! assert (fft (1), 1)
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	172 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	173 %! assert (fft (ones (2,2)), [2,2; 0,0])
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	174 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	175 %! 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	176
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	177 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	178 %! assert (fft (single ([])), single ([]))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	179 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	180 %! assert (fft (zeros (10,0,"single")), zeros (10,0,"single"))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	181 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	182 %! assert (fft (zeros (0,10,"single")), zeros (0,10,"single"))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	183 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	184 %! assert (fft (single (0)), single (0))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	185 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	186 %! assert (fft (single (1)), single (1))
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	187 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	188 %! 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	189 %!testif HAVE_FFTW
59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	190 %! 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	191
28930 2883b3d08b7e maint: Remove unnecessary parentheses bracketing %!error BIST tests. Rik <rik@octave.org> parents: 28631 diff changeset	192 %!error fft ()
6620 bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	193 */
bf4bdc21dc8d [project @ 2007-05-14 17:35:46 by jwe] jwe parents: 5823 diff changeset	194
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	195
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	196 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	197 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	198 @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	199 @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	200 @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	201 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	202 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	203
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	204 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	205 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	206 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	207
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	208 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	209 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	210 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	211 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	212 @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	213 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	214 @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	215
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	216 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	217 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	218 @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	219 @end deftypefn */)
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	220 {
4782 3dfdf6f36854 [project @ 2004-02-17 16:23:22 by jwe] jwe parents: 4773 diff changeset	221 return do_fft (args, "fft", 0);
4773 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
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	224
15039 e753177cde93 maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory Rik <rik@octave.org> parents: 14854 diff changeset	225 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	226 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	227 @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	228 @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	229 @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	230 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	231 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	232
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	233 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	234 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	235 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	236
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	237 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	238 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	239 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	240 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	241 @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	242 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	243 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	244
112b20240c87 move docstrings in C++ files out of C strings and into comments John W. Eaton <jwe@octave.org> parents: 21782 diff changeset	245 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	246 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	247 @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	248 @end deftypefn */)
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	249 {
4782 3dfdf6f36854 [project @ 2004-02-17 16:23:22 by jwe] jwe parents: 4773 diff changeset	250 return do_fft (args, "ifft", 1);
4773 ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	251 }
ccfbd6047a54 [project @ 2004-02-16 19:02:32 by jwe] jwe parents: 4233 diff changeset	252
2928 295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe] jwe parents: diff changeset	253 /*
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	254 ## 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	255 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	256 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	257 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	258 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	259 %! n = 4;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	260 %! 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	261 %! s = cos (n*t);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	262 %! S = fft (s);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	263 %!
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	264 %! answer = zeros (size (t));
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	265 %! 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	266 %! 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	267 %!
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	268 %! assert (S, answer, 4Neps);
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	269
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	270 ## 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	271 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	272 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	273 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	274 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	275 %! n = 7;
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	276 %! 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	277 %! s = cos (n*t);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	278 %!
14854 5ae9f0f77635 maint: Use Octave coding conventions for coddling parenthis is DLD-FUNCTIONS directory Rik <octave@nomad.inbox5.com> parents: 14501 diff changeset	279 %! S = zeros (size (t));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	280 %! S(n+1) = N/2;
c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	281 %! S(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	282 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	283 %! assert (ifft (S), s, 4Neps);
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	284
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	285 ## 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	286 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	287 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	288 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	289 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	290 %! 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	291 %! 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	292 %! s = cos (n*t);
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	293 %! S = fft (s);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	294 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	295 %! 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	296 %! 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	297 %! answer(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	298 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	299 %! assert (S, answer, 4Neps ("single"));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	300
22662 655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	301 ## 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	302 ## Comalco Research and Technology
655157b34a9f Fix segfault when calling fft on last dimension (bug #49026). Rik <rik@octave.org> parents: 22407 diff changeset	303 ## 02 May 2000
25586 59f4fda5c548 remove fftpack sources John W. Eaton <jwe@octave.org> parents: 25054 diff changeset	304 %!testif HAVE_FFTW
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	305 %! N = 64;
60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	306 %! 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	307 %! 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	308 %! s = cos (n*t);
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	309 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	310 %! 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	311 %! 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	312 %! S(N-n+1) = N/2;
11586 12df7854fa7c strip trailing whitespace from source files John W. Eaton <jwe@octave.org> parents: 11553 diff changeset	313 %!
14501 60e5cf354d80 Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	314 %! assert (ifft (S), s, 4Neps ("single"));
7562 c827f5673321 move tests to individual source files John W. Eaton <jwe@octave.org> parents: 7017 diff changeset	315 */
29958 32c3a5805893 move DEFUN and DEFMETHOD functions inside octave namespace John W. Eaton <jwe@octave.org> parents: 29688 diff changeset	316
32c3a5805893 move DEFUN and DEFMETHOD functions inside octave namespace John W. Eaton <jwe@octave.org> parents: 29688 diff changeset	317 OCTAVE_NAMESPACE_END

Mercurial > octave

annotate libinterp/corefcn/fft.cc @ 31210:9ad55d2e1bbf stable