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maint: update copyright notices for 2012
author John W. Eaton <jwe@octave.org>
date Mon, 02 Jan 2012 14:25:41 -0500
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1 /*
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2
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3 Copyright (C) 1994-2012 John W. Eaton
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4 Copyright (C) 2008 Jaroslav Hajek
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include <string>
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29
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30 #include "floatAEPBAL.h"
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31 #include "f77-fcn.h"
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32
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33 extern "C"
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34 {
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35 F77_RET_T
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36 F77_FUNC (sgebal, SGEBAL) (F77_CONST_CHAR_ARG_DECL,
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37 const octave_idx_type&, float*,
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38 const octave_idx_type&, octave_idx_type&,
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39 octave_idx_type&, float*, octave_idx_type&
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40 F77_CHAR_ARG_LEN_DECL);
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41
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42 F77_RET_T
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43 F77_FUNC (sgebak, SGEBAK) (F77_CONST_CHAR_ARG_DECL,
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44 F77_CONST_CHAR_ARG_DECL,
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45 const octave_idx_type&, const octave_idx_type&,
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46 const octave_idx_type&, const float*,
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47 const octave_idx_type&, float*,
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48 const octave_idx_type&, octave_idx_type&
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49 F77_CHAR_ARG_LEN_DECL
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50 F77_CHAR_ARG_LEN_DECL);
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51 }
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52
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53 FloatAEPBALANCE::FloatAEPBALANCE (const FloatMatrix& a,
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54 bool noperm, bool noscal)
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55 : base_aepbal<FloatMatrix, FloatColumnVector> ()
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56 {
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57 octave_idx_type n = a.cols ();
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58
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59 if (a.rows () != n)
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60 {
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61 (*current_liboctave_error_handler) ("AEPBALANCE requires square matrix");
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62 return;
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63 }
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64
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65 octave_idx_type info;
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66
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67 scale = FloatColumnVector (n);
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68 float *pscale = scale.fortran_vec ();
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69
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70 balanced_mat = a;
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71 float *p_balanced_mat = balanced_mat.fortran_vec ();
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72
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73 job = noperm ? (noscal ? 'N' : 'S') : (noscal ? 'P' : 'B');
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74
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75 F77_XFCN (sgebal, SGEBAL, (F77_CONST_CHAR_ARG2 (&job, 1),
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76 n, p_balanced_mat, n, ilo, ihi, pscale, info
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77 F77_CHAR_ARG_LEN (1)));
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78 }
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79
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80 FloatMatrix
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81 FloatAEPBALANCE::balancing_matrix (void) const
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82 {
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83 octave_idx_type n = balanced_mat.rows ();
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84 FloatMatrix balancing_mat (n, n, 0.0);
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85 for (octave_idx_type i = 0; i < n; i++)
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86 balancing_mat.elem (i ,i) = 1.0;
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87
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88 float *p_balancing_mat = balancing_mat.fortran_vec ();
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89 const float *pscale = scale.fortran_vec ();
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90
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91 octave_idx_type info;
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92
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93 char side = 'R';
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94
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95 F77_XFCN (sgebak, SGEBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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96 F77_CONST_CHAR_ARG2 (&side, 1),
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97 n, ilo, ihi, pscale, n,
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98 p_balancing_mat, n, info
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99 F77_CHAR_ARG_LEN (1)
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100 F77_CHAR_ARG_LEN (1)));
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101
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102 return balancing_mat;
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103 }