/usr/share/octave/packages/interval-1.4.1/@infsupdec/subset.m is in octave-interval 1.4.1-1.
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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 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | ## Copyright 2014-2016 Oliver Heimlich
##
## 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 of the License, 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 program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @documentencoding UTF-8
## @defmethod {@@infsupdec} subset (@var{A}, @var{B})
##
## Evaluate subset comparison on intervals.
##
## True, if all numbers from @var{A} are also contained in @var{B}.
## False, if @var{A} contains a number which is not a member in @var{B}.
##
## Evaluated on interval matrices, this functions is applied element-wise.
##
## @seealso{@@infsupdec/eq, @@infsupdec/interior, @@infsupdec/disjoint}
## @end defmethod
## Author: Oliver Heimlich
## Keywords: interval
## Created: 2014-10-13
function result = subset (a, b)
if (nargin ~= 2)
print_usage ();
return
endif
if (not (isa (a, "infsupdec")))
a = infsupdec (a);
endif
if (not (isa (b, "infsupdec")))
b = infsupdec (b);
endif
if (isnai (a) || isnai (b))
result = false ();
else
result = subset (intervalpart (a), intervalpart (b));
endif
endfunction
%!assert (subset (infsupdec (1, 2), infsupdec (1, 3)));
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