Mercurial > octave
view scripts/miscellaneous/mustBePositive.m @ 31198:863730dd0f83 stable
nextpow2: Fix for input between 0.5 and 1 (bug #62947).
* scripts/general/nextpow2.m: Switch to a naïve implementation using log2 with
a single output argument and ceil.
author | Markus Mützel <markus.muetzel@gmx.de> |
---|---|
date | Wed, 24 Aug 2022 17:15:34 +0200 |
parents | 796f54d4ddbf |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 2019-2022 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave 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. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} mustBePositive (@var{x}) ## ## Require that input @var{x} is positive. ## ## Raise an error if any element of the input @var{x} is not positive, as ## determined by @code{@var{x} > 0}. ## ## @seealso{mustBeNonnegative, mustBeNonzero} ## @end deftypefn function mustBePositive (x) if (nargin < 1) print_usage (); endif tf = (x(:) > 0); if (! all (tf)) label = inputname (1); if (isempty (label)) label = "input"; endif bad_idx = find (! tf); try bad_val = x(bad_idx); errmsg = sprintf ("%s must be positive; found %d elements that were not: values %s", ... label, numel (bad_idx), mat2str (bad_val)); catch errmsg = sprintf ("%s must be positive; found %d elements that were not: indexes %s", ... label, numel (bad_idx), mat2str (bad_idx)); end_try_catch error (errmsg); endif endfunction %!test %! mustBePositive (1); %! mustBePositive (123.456); %! mustBePositive (Inf); %! mustBePositive (eps); %!error <Invalid call> mustBePositive () %!error <found 1 elements> mustBePositive (0) %!error <found 1 elements> mustBePositive (0:10) %!error <found 2 elements> mustBePositive ([-1 -2]) %!error <found 2 elements> mustBePositive ([0 1 2 3 -4]) %!error <found 1 elements> mustBePositive (-Inf) %!error <found 1 elements> mustBePositive (NaN)