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complmnt.m
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1997-03-08
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52 lines
## Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA.
## usage: complmnt (a, b)
##
## Returns the elements of set b that are not in set a.
##
## See - crt_set, union, intrsect
## Author: jwe
function y = complmnt (a, b)
if (nargin != 2)
usage ("complmnt(a,b)");
endif
if (isempty (a))
y = crt_set(b);
elseif (isempty (b))
y = [];
else
a = crt_set (a);
b = crt_set (b);
yindex = 1;
y = zeros (1, length (b));
for index = 1:length (b)
if (all (a != b (index)))
y(yindex++) = b(index);
endif
endfor
y = y(1:(yindex-1));
endif
endfunction