/usr/share/octave/packages/interval-1.4.1/@infsupdec/intervalpart.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 | ## 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
## @deftypemethod {@@infsupdec} {@var{S} =} intervalpart (@var{X})
##
## Return the bare interval for the decorated interval @var{X}.
##
## @seealso{@@infsupdec/decorationpart}
## @end deftypemethod
## Author: Oliver Heimlich
## Keywords: interval
## Created: 2014-10-12
function bare = intervalpart (x)
if (nargin ~= 1)
print_usage ();
return
endif
if (isnai (x))
error ("interval:IntvlPartOfNaI", "intervalpart: NaI has no interval part")
endif
## This also works for the empty interval
bare = infsup (inf (x), sup (x));
endfunction
%!assert (intervalpart (infsupdec (2, 3)) == infsup (2, 3));
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