view liboctave/array/Sparse-C.cc @ 19257:d20c81d3cd21

Deprecate syl, add new function sylvester. * sylvester.cc: New function * syl.cc: Remove syl C++ function. * scriptss/deprecated/syl.m: m-file to replace syl.cc * NEWS: Announce new sylvester function. Announce deprecation of syl. * linalg.txi: Replace reference to syl with sylvester. * libinterp/corefcn/module.mk: Add sylvester.cc to build system. * scripts/deprecated/module.mk: Add syl.m to build system. * CMatrix.cc (Sylvester), dMatrix.cc (Sylvester), fCMatrix.cc (Sylvester), fMatrix.cc (Sylvester): Return +C rather than -C to conform to changed definition of Sylvester equation.
author Rik <rik@octave.org>
date Sun, 31 Aug 2014 21:05:38 -0700
parents d63878346099
children 4197fc428c7d
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/*

Copyright (C) 2004-2013 David Bateman
Copyright (C) 1998-2004 Andy Adler

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

// Instantiate Sparse matrix of complex values.

#include "oct-cmplx.h"
#include "lo-mappers.h"
#include "lo-ieee.h"
#include "Sparse.h"
#include "Sparse.cc"


static double
xabs (const Complex& x)
{
  return (xisinf (x.real ()) || xisinf (x.imag ())) ? octave_Inf : abs (x);
}


template <>
bool
sparse_ascending_compare<Complex> (const Complex& a, const Complex& b)
{
  return (xisnan (b) || (xabs (a) < xabs (b))
          || ((xabs (a) == xabs (b)) && (arg (a) < arg (b))));
}

template <>
bool
sparse_descending_compare<Complex> (const Complex& a, const Complex& b)
{
  return (xisnan (a) || (xabs (a) > xabs (b))
          || ((xabs (a) == xabs (b)) && (arg (a) > arg (b))));
}

INSTANTIATE_SPARSE (Complex, OCTAVE_API);

#if 0
template std::ostream& operator << (std::ostream&, const Sparse<Complex>&);
#endif