/usr/share/octave/packages/interval-2.1.0/@infsupdec/eq.m is in octave-interval 2.1.0-2.
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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 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | ## 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
## @defop Method {@@infsupdec} eq (@var{A}, @var{B})
## @defopx Operator {@@infsupdec} {@var{A} == @var{B}}
##
## Compare intervals @var{A} and @var{B} for equality.
##
## True, if all numbers from @var{A} are also contained in @var{B} and vice
## versa. False, if @var{A} contains a number which is not a member in @var{B}
## or vice versa.
##
## @example
## @group
## x = infsupdec (2, 3);
## y = infsupdec (1, 2);
## x == y
## @result{} ans = 0
## @end group
## @end example
## @seealso{@@infsupdec/subset, @@infsupdec/interior, @@infsupdec/disjoint}
## @end defop
## Author: Oliver Heimlich
## Keywords: interval
## Created: 2014-10-13
function result = eq (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
result = eq (a.infsup, b.infsup);
result(isnai (a) | isnai (b)) = false ();
endfunction
%!# Empty interval
%!assert (eq (infsupdec (), infsupdec ()) == true);
%!assert (eq (infsupdec (), infsupdec (1)) == false);
%!assert (eq (infsupdec (0), infsupdec ()) == false);
%!assert (eq (infsupdec (-inf, inf), infsupdec ()) == false);
%!# Singleton intervals
%!assert (eq (infsupdec (0), infsupdec (1)) == false);
%!assert (eq (infsupdec (0), infsupdec (0)) == true);
%!# Bounded intervals
%!assert (eq (infsupdec (1, 2), infsupdec (3, 4)) == false);
%!assert (eq (infsupdec (1, 2), infsupdec (2, 3)) == false);
%!assert (eq (infsupdec (1, 2), infsupdec (1.5, 2.5)) == false);
%!assert (eq (infsupdec (1, 2), infsupdec (1, 2)) == true);
%!# Unbounded intervals
%!assert (eq (infsupdec (0, inf), infsupdec (-inf, 0)) == false);
%!assert (eq (infsupdec (0, inf), infsupdec (0, inf)) == true);
%!assert (eq (infsupdec (-inf, 0), infsupdec (-inf, 0)) == true);
%!assert (eq (infsupdec (-inf, inf), infsupdec (42)) == false);
%!assert (eq (infsupdec (-inf, 0), infsupdec (-inf, inf)) == false);
%!assert (eq (infsupdec (-inf, inf), infsupdec (-inf, inf)) == true);
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