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annotate liboctave/base-qr.cc @ 14193:72aebe619641 stable rc-3-6-0-0

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3.6.0-rc0 release candidate * configure.ac (AC_INIT): Version is now 3.6.0-rc0. (OCTAVE_RELEASE_DATE): Now 2012-01-10. (OCTAVE_API_VERSION_NUMBER): Now 47.
author John W. Eaton <jwe@octave.org>
date Tue, 10 Jan 2012 16:43:41 -0500
parents 72c96de7a403
children
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1 /*
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2
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3 Copyright (C) 2009-2012 Jaroslav Hajek
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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 "base-qr.h"
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28
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29 template <class qr_type>
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30 base_qr<qr_type>::base_qr (const qr_type& q_arg, const qr_type& r_arg)
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31 : q (q_arg), r (r_arg)
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32 {
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33 octave_idx_type q_nr = q.rows (), q_nc = q.columns ();
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34 octave_idx_type r_nr = r.rows (), r_nc = r.columns ();
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35
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36 if (! (q_nc == r_nr && (q_nr == q_nc || (q_nr > q_nc && r_nr == r_nc))))
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37 {
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38 q = qr_type ();
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39 r = qr_type ();
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40
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41 (*current_liboctave_error_handler) ("QR dimensions mismatch");
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42 }
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43 }
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44
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45 template <class qr_type>
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46 qr_type_t
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47 base_qr<qr_type>::get_type (void) const
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48 {
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49 qr_type_t retval;
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50
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51 if (!q.is_empty () && q.is_square ())
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52 retval = qr_type_std;
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53 else if (q.rows () > q.columns () && r.is_square ())
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54 retval = qr_type_economy;
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55 else
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56 retval = qr_type_raw;
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57
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58 return retval;
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59 }
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60
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61 template <class qr_type>
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62 bool
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63 base_qr<qr_type>::regular (void) const
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64 {
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65 bool retval = true;
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66
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67 octave_idx_type k = std::min (r.rows (), r.columns ());
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68
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69 for (octave_idx_type i = 0; i < k; i++)
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70 {
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71 if (r(i, i) == qr_elt_type ())
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72 {
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73 retval = false;
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74 break;
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75 }
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76 }
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77
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78 return retval;
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79 }
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80