Mercurial > octave
view scripts/image/lines.m @ 31218:a33a9c87220b stable
imformats.m: Fix "isa" function in return value (bug #62974)
* imformats.m (isa_magick): Fix typo "Format" to "format" for name of field in
struct returned from __magick_ping__.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 30 Aug 2022 15:24:29 -0700 |
parents | 796f54d4ddbf |
children | 597f3ee61a48 |
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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 {} {@var{map} =} lines () ## @deftypefnx {} {@var{map} =} lines (@var{n}) ## Create color colormap. This colormap is composed of the list of colors ## in the current axes @qcode{"ColorOrder"} property. The default is blue, ## orange, yellow, purple, green, light blue, and dark red. ## ## The argument @var{n} must be a scalar. ## If unspecified, the length of the current colormap, or 64, is used. ## @seealso{colormap} ## @end deftypefn function map = lines (n) hf = get (groot, "currentfigure"); if (nargin == 1) if (! isscalar (n)) error ("lines: N must be a scalar"); endif n = double (n); else if (! isempty (hf)) n = rows (get (hf, "colormap")); else n = 64; endif endif if (n == 1) map = [0, 0, 1]; elseif (n > 1) hax = get (hf, "currentaxes"); if (! isempty (hax)) C = get (hax, "colororder"); else C = get (groot, "defaultaxescolororder"); endif nr = rows (C); map = C(rem (0:(n-1), nr) + 1, :); else map = zeros (0, 3); endif endfunction %!demo %! ## Show the 'lines' colormap profile and as an image %! cmap = lines (21); # default has 7 colors, therefore cycle 3 times %! subplot (2, 1, 1); %! rgbplot (cmap, "composite"); %! subplot (2, 1, 2); %! rgbplot (cmap);