/usr/share/octave/packages/linear-algebra-2.2.0/@kronprod/uminus.m is in octave-linear-algebra 2.2.0-1build1.
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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 | ## Copyright (C) 2010 Soren Hauberg
##
## This program 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, or (at your option)
## any later version.
##
## This program 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 this file. If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} uminus (@var{KP})
## Returns the unary minus operator working on the Kronecker product @var{KP}.
## This corresponds to @code{-@var{KP}} and simply returns the Kronecker
## product with the sign of the smallest matrix in the product reversed.
## @seealso{@@kronprod/uminus}
## @end deftypefn
function KP = uplus (KP)
if (nargin != 1)
print_usage ();
endif
if (!isa (KP, "kronprod"))
error ("uplus: input must be of class 'kronprod'");
endif
if (numel (KP.A) < numel (KP.B))
KP.A *= -1;
else
KP.B *= -1;
endif
endfunction
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