Mercurial > octave
view scripts/image/iscolormap.m @ 31207:1c40fc2344f4 stable
quad2d.m: Add BIST test to cset b0e90ca8e679 (bug #62972)
* quad2d.m: Add BIST test for bug #62972.
author | Rik <rik@octave.org> |
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date | Sun, 28 Aug 2022 14:19:43 -0700 |
parents | 796f54d4ddbf |
children | 83f9f8bda883 |
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######################################################################## ## ## Copyright (C) 2012-2022 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 {} {} iscolormap (@var{cmap}) ## Return true if @var{cmap} is a colormap. ## ## A colormap is a real matrix, of class single or double, with 3 columns. ## Each row represents a single color. The 3 columns contain red, green, ## and blue intensities respectively. ## ## All values in a colormap should be in the [0 1] range but this is not ## enforced. Each function must decide what to do for values outside this ## range. ## ## @seealso{colormap, rgbplot} ## @end deftypefn function retval = iscolormap (cmap) if (nargin < 1) print_usage (); endif retval = (isnumeric (cmap) && isreal (cmap) && ndims (cmap) == 2 && columns (cmap) == 3 && isfloat (cmap)); endfunction %!assert (iscolormap (jet (64))) %!assert (iscolormap ({0 1 0}), false) %!assert (iscolormap ([0 1i 0]), false) %!assert (iscolormap (ones (3,3,3)), false) %!assert (iscolormap (ones (3,4)), false)