Mercurial > octave-nkf
annotate libinterp/corefcn/rcond.cc @ 20616:fd0efcdb3718
use new string_value method to handle value extraction errors
* dirfns.cc, file-io.cc, gammainc.cc, help.cc, load-path.cc,
octave-link.cc, qz.cc, regexp.cc, strfns.cc, syscalls.cc, time.cc,
variables.cc: Use new string_value method.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 08 Oct 2015 19:00:51 -0400 |
| parents | 4f45eaf83908 |
| children |
| rev | line source |
|---|---|
| 7788 | 1 /* |
| 2 | |
|
19731
4197fc428c7d
maint: Update copyright notices for 2015.
John W. Eaton <jwe@octave.org>
parents:
17787
diff
changeset
|
3 Copyright (C) 2008-2015 David Bateman |
| 7788 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 3 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with Octave; see the file COPYING. If not, see | |
| 19 <http://www.gnu.org/licenses/>. | |
| 20 | |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
| 24 #include <config.h> | |
| 25 #endif | |
| 26 | |
|
15039
e753177cde93
maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents:
14501
diff
changeset
|
27 #include "defun.h" |
| 7788 | 28 #include "error.h" |
| 29 #include "gripes.h" | |
| 30 #include "oct-obj.h" | |
| 31 #include "utils.h" | |
| 32 | |
|
15039
e753177cde93
maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents:
14501
diff
changeset
|
33 DEFUN (rcond, args, , |
|
17787
175b392e91fe
Use GNU style coding conventions for code in libinterp/
Rik <rik@octave.org>
parents:
17744
diff
changeset
|
34 "-*- texinfo -*-\n\ |
|
15039
e753177cde93
maint: Move non-dynamically linked functions from DLD-FUNCTIONS/ to corefcn/ directory
Rik <rik@octave.org>
parents:
14501
diff
changeset
|
35 @deftypefn {Built-in Function} {@var{c} =} rcond (@var{A})\n\ |
|
11553
01f703952eff
Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents:
11523
diff
changeset
|
36 Compute the 1-norm estimate of the reciprocal condition number as returned\n\ |
|
20207
4f45eaf83908
doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents:
19731
diff
changeset
|
37 by @sc{lapack}.\n\ |
|
4f45eaf83908
doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents:
19731
diff
changeset
|
38 \n\ |
|
4f45eaf83908
doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents:
19731
diff
changeset
|
39 If the matrix is well-conditioned then @var{c} will be near 1 and if the\n\ |
|
4f45eaf83908
doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents:
19731
diff
changeset
|
40 matrix is poorly conditioned it will be close to 0.\n\ |
| 7788 | 41 \n\ |
|
11553
01f703952eff
Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents:
11523
diff
changeset
|
42 The matrix @var{A} must not be sparse. If the matrix is sparse then\n\ |
|
01f703952eff
Improve docstrings for functions in DLD-FUNCTIONS directory.
Rik <octave@nomad.inbox5.com>
parents:
11523
diff
changeset
|
43 @code{condest (@var{A})} or @code{rcond (full (@var{A}))} should be used\n\ |
| 7788 | 44 instead.\n\ |
|
11572
7d6d8c1e471f
Grammarcheck Texinfo for files in src directory.
Rik <octave@nomad.inbox5.com>
parents:
11553
diff
changeset
|
45 @seealso{cond, condest}\n\ |
| 7788 | 46 @end deftypefn") |
| 47 { | |
| 48 octave_value retval; | |
| 49 | |
| 50 int nargin = args.length (); | |
| 51 | |
| 52 if (nargin != 1) | |
| 53 print_usage (); | |
| 54 else if (args(0).is_sparse_type ()) | |
| 55 error ("rcond: for sparse matrices use 'rcond (full (a))' or 'condest (a)' instead"); | |
|
7797
f42c6f8d6d8e
Extend rcond function to single precision types
David Bateman <dbateman@free.fr>
parents:
7788
diff
changeset
|
56 else if (args(0).is_single_type ()) |
|
f42c6f8d6d8e
Extend rcond function to single precision types
David Bateman <dbateman@free.fr>
parents:
7788
diff
changeset
|
57 { |
|
f42c6f8d6d8e
Extend rcond function to single precision types
David Bateman <dbateman@free.fr>
parents:
7788
diff
changeset
|
58 if (args(0).is_complex_type ()) |
|
10154
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
59 { |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
60 FloatComplexMatrix m = args(0).float_complex_matrix_value (); |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
61 MatrixType mattyp; |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
62 retval = m.rcond (mattyp); |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
63 args(0).matrix_type (mattyp); |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
64 } |
|
7797
f42c6f8d6d8e
Extend rcond function to single precision types
David Bateman <dbateman@free.fr>
parents:
7788
diff
changeset
|
65 else |
|
10154
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
66 { |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
67 FloatMatrix m = args(0).float_matrix_value (); |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
68 MatrixType mattyp; |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
69 retval = m.rcond (mattyp); |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
70 args(0).matrix_type (mattyp); |
|
40dfc0c99116
DLD-FUNCTIONS/*.cc: untabify
John W. Eaton <jwe@octave.org>
parents:
9245
diff
changeset
|
71 } |
|
7797
f42c6f8d6d8e
Extend rcond function to single precision types
David Bateman <dbateman@free.fr>
parents:
7788
diff
changeset
|
72 } |
| 7788 | 73 else if (args(0).is_complex_type ()) |
| 74 { | |
| 75 ComplexMatrix m = args(0).complex_matrix_value (); | |
| 76 MatrixType mattyp; | |
| 77 retval = m.rcond (mattyp); | |
| 78 args(0).matrix_type (mattyp); | |
| 79 } | |
| 80 else | |
| 81 { | |
| 82 Matrix m = args(0).matrix_value (); | |
| 83 MatrixType mattyp; | |
| 84 retval = m.rcond (mattyp); | |
| 85 args(0).matrix_type (mattyp); | |
| 86 } | |
| 87 | |
| 88 return retval; | |
| 89 } | |
|
12791
610a4e780a19
codesprint: write 4 test for rcond
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents:
11572
diff
changeset
|
90 |
|
610a4e780a19
codesprint: write 4 test for rcond
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents:
11572
diff
changeset
|
91 /* |
|
14501
60e5cf354d80
Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents:
14138
diff
changeset
|
92 %!assert (rcond (eye (2)), 1) |
|
60e5cf354d80
Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents:
14138
diff
changeset
|
93 %!assert (rcond (ones (2)), 0) |
|
60e5cf354d80
Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents:
14138
diff
changeset
|
94 %!assert (rcond ([1 1; 2 1]), 1/9) |
|
60e5cf354d80
Update %!tests in DLD-FUNCTIONS/ directory with Octave coding conventions.
Rik <octave@nomad.inbox5.com>
parents:
14138
diff
changeset
|
95 %!assert (rcond (magic (4)), 0, eps) |
|
12791
610a4e780a19
codesprint: write 4 test for rcond
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents:
11572
diff
changeset
|
96 |
|
15382
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
97 %!shared x, sx |
|
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
98 %! x = [-5.25, -2.25; -2.25, 1] * eps () + ones (2) / 2; |
|
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
99 %! sx = [-5.25, -2.25; -2.25, 1] * eps ("single") + ones (2) / 2; |
|
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
100 %!assert (rcond (x) < eps ()); |
|
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
101 %!assert (rcond (sx) < eps ('single')); |
|
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
102 %!assert (rcond (x*i) < eps ()); |
|
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
103 %!assert (rcond (sx*i) < eps ('single')); |
|
197774b411ec
rcond: use new copy of data for full factorization if positive definite cholesky factorization fails (bug #37336)
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
104 |
|
12791
610a4e780a19
codesprint: write 4 test for rcond
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents:
11572
diff
changeset
|
105 */ |