/usr/share/octave/packages/interval-1.4.1/@infsup/isentire.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 | ## 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 {@@infsup} isentire (@var{X})
##
## Check if the interval represents the entire set of real numbers.
##
## Evaluated on interval matrices, this functions is applied element-wise.
##
## @seealso{entire, @@infsup/eq, @@infsup/isempty, @@infsup/issingleton}
## @end defmethod
## Author: Oliver Heimlich
## Keywords: interval
## Created: 2014-09-27
function result = isentire (interval)
if (nargin ~= 1)
print_usage ();
return
endif
result = (interval.inf == -inf & interval.sup == inf);
endfunction
%!assert (isentire (entire ()));
%!assert (isentire (intervalpart (entire ())));
%!assert (not (isentire (empty ())));
%!assert (not (isentire (intervalpart (empty ()))));
%!warning assert (not (isentire (infsupdec (2, 1))));
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