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annotate liboctave/numeric/fCmplxAEPBAL.cc @ 21232:b8cf410b5c88

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eliminate feature tests from lo-mappers.h * lo-mappers.h, lo-mappers.cc (xisinf, xisnan, xfinite): Move feature tests inside functions in lo-mappers.cc.
author John W. Eaton <jwe@octave.org>
date Tue, 09 Feb 2016 04:55:29 -0500
parents f7121e111991
children
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1 /*
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2
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3 Copyright (C) 1994-2015 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 "fCmplxAEPBAL.h"
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31 #include "fMatrix.h"
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32 #include "f77-fcn.h"
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33
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34 extern "C"
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35 {
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36 F77_RET_T
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37 F77_FUNC (cgebal, CGEBAL) (F77_CONST_CHAR_ARG_DECL,
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38 const octave_idx_type&, FloatComplex*,
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39 const octave_idx_type&, octave_idx_type&,
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40 octave_idx_type&, float*, octave_idx_type&
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41 F77_CHAR_ARG_LEN_DECL);
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42
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43 F77_RET_T
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44 F77_FUNC (cgebak, CGEBAK) (F77_CONST_CHAR_ARG_DECL,
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45 F77_CONST_CHAR_ARG_DECL,
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46 const octave_idx_type&, const octave_idx_type&,
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47 const octave_idx_type&, const float*,
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48 const octave_idx_type&, FloatComplex*,
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49 const octave_idx_type&, octave_idx_type&
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50 F77_CHAR_ARG_LEN_DECL
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51 F77_CHAR_ARG_LEN_DECL);
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52 }
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53
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54 FloatComplexAEPBALANCE::FloatComplexAEPBALANCE (const FloatComplexMatrix& a,
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55 bool noperm, bool noscal)
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56 : base_aepbal<FloatComplexMatrix, FloatColumnVector> ()
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57 {
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58 octave_idx_type n = a.cols ();
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59
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60 if (a.rows () != n)
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61 (*current_liboctave_error_handler) ("AEPBALANCE requires square matrix");
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62
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63 octave_idx_type info;
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64
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65 scale = FloatColumnVector (n);
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66 float *pscale = scale.fortran_vec ();
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67
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68 balanced_mat = a;
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69 FloatComplex *p_balanced_mat = balanced_mat.fortran_vec ();
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70
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71 job = noperm ? (noscal ? 'N' : 'S') : (noscal ? 'P' : 'B');
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72
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73 F77_XFCN (cgebal, CGEBAL, (F77_CONST_CHAR_ARG2 (&job, 1),
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74 n, p_balanced_mat, n, ilo, ihi,
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75 pscale, info
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76 F77_CHAR_ARG_LEN (1)));
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77 }
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78
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79 FloatComplexMatrix
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80 FloatComplexAEPBALANCE::balancing_matrix (void) const
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81 {
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82 octave_idx_type n = balanced_mat.rows ();
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83 FloatComplexMatrix balancing_mat (n, n, 0.0);
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84 for (octave_idx_type i = 0; i < n; i++)
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85 balancing_mat.elem (i, i) = 1.0;
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86
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87 FloatComplex *p_balancing_mat = balancing_mat.fortran_vec ();
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88 const float *pscale = scale.fortran_vec ();
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89
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90 octave_idx_type info;
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91
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92 char side = 'R';
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93
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94 F77_XFCN (cgebak, CGEBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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95 F77_CONST_CHAR_ARG2 (&side, 1),
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96 n, ilo, ihi, pscale, n,
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97 p_balancing_mat, n, info
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98 F77_CHAR_ARG_LEN (1)
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99 F77_CHAR_ARG_LEN (1)));
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100
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101 return balancing_mat;
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102 }