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annotate liboctave/fCmplxGEPBAL.cc @ 16088:b29b10fbb744 stable release-3-6-4

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Version 3.6.4 released. * configure.ac (AC_INIT): Version is now 3.6.4. (OCTAVE_RELEASE_DATE): Now 2013-02-21.
author John W. Eaton <jwe@octave.org>
date Thu, 21 Feb 2013 15:17:54 -0500
parents 72c96de7a403
children 460a3c6d8bf1
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1 /*
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2
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72c96de7a403 maint: update copyright notices for 2012
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3 Copyright (C) 1994-2012 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <string>
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28 #include <vector>
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29
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30 #include "fCmplxGEPBAL.h"
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31 #include "Array-util.h"
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32 #include "f77-fcn.h"
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33 #include "oct-locbuf.h"
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34
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35 extern "C"
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36 {
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37 F77_RET_T
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38 F77_FUNC (cggbal, CGGBAL) (F77_CONST_CHAR_ARG_DECL,
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39 const octave_idx_type& N,
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40 FloatComplex* A, const octave_idx_type& LDA,
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41 FloatComplex* B, const octave_idx_type& LDB,
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42 octave_idx_type& ILO, octave_idx_type& IHI,
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43 float* LSCALE, float* RSCALE,
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44 float* WORK, octave_idx_type& INFO
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45 F77_CHAR_ARG_LEN_DECL);
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46
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47 F77_RET_T
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48 F77_FUNC (sggbak, SGGBAK) (F77_CONST_CHAR_ARG_DECL,
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49 F77_CONST_CHAR_ARG_DECL,
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50 const octave_idx_type& N,
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51 const octave_idx_type& ILO,
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52 const octave_idx_type& IHI, const float* LSCALE,
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53 const float* RSCALE, octave_idx_type& M, float* V,
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54 const octave_idx_type& LDV, octave_idx_type& INFO
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55 F77_CHAR_ARG_LEN_DECL
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56 F77_CHAR_ARG_LEN_DECL);
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57
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58 }
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59
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60 octave_idx_type
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61 FloatComplexGEPBALANCE::init (const FloatComplexMatrix& a, const FloatComplexMatrix& b,
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62 const std::string& balance_job)
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63 {
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64 octave_idx_type n = a.cols ();
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65
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66 if (a.rows () != n)
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67 {
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68 (*current_liboctave_error_handler) ("FloatComplexGEPBALANCE requires square matrix");
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69 return -1;
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70 }
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71
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72 if (a.dims() != b.dims ())
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73 {
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74 gripe_nonconformant ("FloatComplexGEPBALANCE", n, n, b.rows(), b.cols());
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75 return -1;
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76 }
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77
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78 octave_idx_type info;
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79 octave_idx_type ilo;
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80 octave_idx_type ihi;
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81
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82 OCTAVE_LOCAL_BUFFER (float, plscale, n);
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83 OCTAVE_LOCAL_BUFFER (float, prscale, n);
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84 OCTAVE_LOCAL_BUFFER (float, pwork, 6 * n);
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85
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86 balanced_mat = a;
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87 FloatComplex *p_balanced_mat = balanced_mat.fortran_vec ();
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88 balanced_mat2 = b;
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89 FloatComplex *p_balanced_mat2 = balanced_mat2.fortran_vec ();
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90
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91 char job = balance_job[0];
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92
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93 F77_XFCN (cggbal, CGGBAL, (F77_CONST_CHAR_ARG2 (&job, 1),
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94 n, p_balanced_mat, n, p_balanced_mat2,
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95 n, ilo, ihi, plscale,prscale, pwork, info
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96 F77_CHAR_ARG_LEN (1)));
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97
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98 balancing_mat = FloatMatrix (n, n, 0.0);
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99 balancing_mat2 = FloatMatrix (n, n, 0.0);
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100 for (octave_idx_type i = 0; i < n; i++)
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101 {
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102 octave_quit ();
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103 balancing_mat.elem (i ,i) = 1.0;
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104 balancing_mat2.elem (i ,i) = 1.0;
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105 }
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106
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107 float *p_balancing_mat = balancing_mat.fortran_vec ();
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108 float *p_balancing_mat2 = balancing_mat2.fortran_vec ();
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109
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110 // first left
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111 F77_XFCN (sggbak, SGGBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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112 F77_CONST_CHAR_ARG2 ("L", 1),
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113 n, ilo, ihi, plscale, prscale,
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114 n, p_balancing_mat, n, info
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115 F77_CHAR_ARG_LEN (1)
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116 F77_CHAR_ARG_LEN (1)));
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117
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118 // then right
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119 F77_XFCN (sggbak, SGGBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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120 F77_CONST_CHAR_ARG2 ("R", 1),
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121 n, ilo, ihi, plscale, prscale,
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122 n, p_balancing_mat2, n, info
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123 F77_CHAR_ARG_LEN (1)
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124 F77_CHAR_ARG_LEN (1)));
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125
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126 return info;
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127 }