/usr/include/octave-3.8.1/octave/base-qr.cc is in liboctave-dev 3.8.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | /*
Copyright (C) 2009-2013 Jaroslav Hajek
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "base-qr.h"
template <class qr_type>
base_qr<qr_type>::base_qr (const qr_type& q_arg, const qr_type& r_arg)
: q (q_arg), r (r_arg)
{
octave_idx_type q_nr = q.rows (), q_nc = q.columns ();
octave_idx_type r_nr = r.rows (), r_nc = r.columns ();
if (! (q_nc == r_nr && (q_nr == q_nc || (q_nr > q_nc && r_nr == r_nc))))
{
q = qr_type ();
r = qr_type ();
(*current_liboctave_error_handler) ("QR dimensions mismatch");
}
}
template <class qr_type>
qr_type_t
base_qr<qr_type>::get_type (void) const
{
qr_type_t retval;
if (!q.is_empty () && q.is_square ())
retval = qr_type_std;
else if (q.rows () > q.columns () && r.is_square ())
retval = qr_type_economy;
else
retval = qr_type_raw;
return retval;
}
template <class qr_type>
bool
base_qr<qr_type>::regular (void) const
{
bool retval = true;
octave_idx_type k = std::min (r.rows (), r.columns ());
for (octave_idx_type i = 0; i < k; i++)
{
if (r(i, i) == qr_elt_type ())
{
retval = false;
break;
}
}
return retval;
}
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