/usr/share/octave/packages/interval-1.4.1/entire.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 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | ## 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
## @defun entire ()
## @defunx entire (@var{N})
## @defunx entire (@var{N}, @var{M})
##
## Return the entire set of real numbers.
##
## With additional parameters, create an interval vector/matrix, which
## comprises entire interval entries.
##
## The entire set of real numbers [Entire] is a closed interval. If used as
## an enclosure for a certain value, it represents a state of minimum
## constraints. An interval function which evaluates to [Entire] yields no
## information at all if no interval decoration is present.
##
## The special floating-point values -Inf and Inf represent boundaries of the
## entire set of real numbers. However, they are not members of the interval.
##
## The result of this function carries the defined and continuous @code{dac}
## decoration, which denotes that the interval is not bounded and therefore is
## no common interval.
##
## Accuracy: The representation of the entire set of real numbers is exact.
##
## @example
## @group
## x = entire ()
## @result{} x = [Entire]_dac
## inf (x)
## @result{} ans = -Inf
## sup (x)
## @result{} ans = Inf
## @end group
## @end example
## @seealso{@@infsup/isentire, empty}
## @end defun
## Author: Oliver Heimlich
## Keywords: interval
## Created: 2014-09-27
function result = entire (varargin)
switch nargin
case 0
result = infsupdec (-inf, inf);
case 1
result = infsupdec (-inf (varargin {1}), inf (varargin {1}));
case 2
result = infsupdec (-inf (varargin {1}, varargin {2}), ...
+inf (varargin {1}, varargin {2}));
otherwise
print_usage();
endswitch
endfunction
%!assert (inf (entire ()), -inf);
%!assert (sup (entire ()), inf);
%!assert (decorationpart (entire ()), {"dac"});
%!assert (inf (entire (5)), -inf (5));
%!assert (sup (entire (5)), inf (5));
%!assert (strcmp (decorationpart (entire (5)), "dac"), true (5));
%!assert (inf (entire (5, 6)), -inf (5, 6));
%!assert (sup (entire (5, 6)), inf (5, 6));
%!assert (strcmp (decorationpart (entire (5, 6)), "dac"), true (5, 6));
|