home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Geek Gadgets 1
/
ADE-1.bin
/
ade-dist
/
octave-1.1.1p1-src.tgz
/
tar.out
/
fsf
/
octave
/
liboctave
/
CmplxCHOL.cc
< prev
next >
Wrap
C/C++ Source or Header
|
1996-09-28
|
2KB
|
79 lines
// -*- C++ -*-
/*
Copyright (C) 1992, 1993, 1994, 1995 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 2, 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, write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "CmplxCHOL.h"
#include "mx-inlines.cc"
#include "lo-error.h"
#include "f77-uscore.h"
extern "C"
{
int F77_FCN (zpotrf) (const char*, const int*, Complex*, const int*,
int*, long);
}
int
ComplexCHOL::init (const ComplexMatrix& a)
{
int a_nr = a.rows ();
int a_nc = a.cols ();
if (a_nr != a_nc)
{
(*current_liboctave_error_handler)
("ComplexCHOL requires square matrix");
return -1;
}
char uplo = 'U';
int n = a_nc;
int info;
Complex *h = dup (a.data (), a.length ());
F77_FCN (zpotrf) (&uplo, &n, h, &n, &info, 1L);
chol_mat = ComplexMatrix (h, n, n);
// If someone thinks of a more graceful way of doing this (or faster for
// that matter :-)), please let me know!
if (n > 1)
for (int j = 0; j < a_nc; j++)
for (int i = j+1; i < a_nr; i++)
chol_mat.elem (i, j) = 0.0;
return info;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; page-delimiter: "^/\\*" ***
;;; End: ***
*/