/usr/share/octave/packages/interval-1.4.1/@infsup/inf.m is in octave-interval 1.4.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | ## 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} inf (@var{X})
##
## Get the (greatest) lower boundary for all numbers of interval @var{X}.
##
## If @var{X} is empty, @code{inf (@var{X})} is positive infinity.
##
## Accuracy: The result is exact.
##
## @example
## @group
## inf (infsup (2.5, 3.5))
## @result{} ans = 2.5000
## @end group
## @end example
## @seealso{@@infsup/sup, @@infsup/mid}
## @end defmethod
## Author: Oliver Heimlich
## Keywords: interval
## Created: 2014-09-27
function result = inf (x)
if (nargin ~= 1)
print_usage ();
return
endif
if (isa (x, "infsupdec"))
## We cannot override this function in infsupdec, because that would create
## an infinite loop.
if (isnai (x))
error ("interval:NaI", "NaI has no infimum")
endif
endif
result = x.inf;
endfunction
%!test "from the documentation string";
%! assert (inf (infsup (2.5, 3.5)), 2.5);
|