/usr/include/octave-3.2.4/octave/base-lu.cc is in octave3.2-headers 3.2.4-12.
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 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | /*
Copyright (C) 1996, 1997, 2002, 2003, 2004, 2005, 2007, 2008 John W. Eaton
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-lu.h"
template <class lu_type>
lu_type
base_lu <lu_type> :: L (void) const
{
octave_idx_type a_nr = a_fact.rows ();
octave_idx_type a_nc = a_fact.cols ();
octave_idx_type mn = (a_nr < a_nc ? a_nr : a_nc);
lu_type l (a_nr, mn, lu_elt_type (0.0));
for (octave_idx_type i = 0; i < a_nr; i++)
{
if (i < a_nc)
l.xelem (i, i) = 1.0;
for (octave_idx_type j = 0; j < (i < a_nc ? i : a_nc); j++)
l.xelem (i, j) = a_fact.xelem (i, j);
}
return l;
}
template <class lu_type>
lu_type
base_lu <lu_type> :: U (void) const
{
octave_idx_type a_nr = a_fact.rows ();
octave_idx_type a_nc = a_fact.cols ();
octave_idx_type mn = (a_nr < a_nc ? a_nr : a_nc);
lu_type u (mn, a_nc, lu_elt_type (0.0));
for (octave_idx_type i = 0; i < mn; i++)
{
for (octave_idx_type j = i; j < a_nc; j++)
u.xelem (i, j) = a_fact.xelem (i, j);
}
return u;
}
template <class lu_type>
Array<octave_idx_type>
base_lu <lu_type> :: getp (void) const
{
octave_idx_type a_nr = a_fact.rows ();
Array<octave_idx_type> pvt (a_nr);
for (octave_idx_type i = 0; i < a_nr; i++)
pvt.xelem (i) = i;
for (octave_idx_type i = 0; i < ipvt.length(); i++)
{
octave_idx_type k = ipvt.xelem (i);
if (k != i)
{
octave_idx_type tmp = pvt.xelem (k);
pvt.xelem (k) = pvt.xelem (i);
pvt.xelem (i) = tmp;
}
}
return pvt;
}
template <class lu_type>
PermMatrix
base_lu <lu_type> :: P (void) const
{
return PermMatrix (getp (), false);
}
template <class lu_type>
ColumnVector
base_lu <lu_type> :: P_vec (void) const
{
octave_idx_type a_nr = a_fact.rows ();
ColumnVector p (a_nr);
Array<octave_idx_type> pvt = getp ();
for (octave_idx_type i = 0; i < a_nr; i++)
p.xelem (i) = static_cast<double> (pvt.xelem (i) + 1);
return p;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
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