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annotate scripts/image/lines.m @ 14640:b9c02ee24de1

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new colormap options * colormap.m: New options, list, register, and unregister. * NEWS: Note new colormap options. * autumn.m, bone.m, cool.m, copper.m, flag.m, gmap40.m, gray.m, hot.m, hsv.m, jet.m, lines.m, ocean.m, pink.m, prism.m, rainbow.m, spring.m, summer.m, winter: Always size and return 0x3 when size < 1. Include PKD_ADD and PKG_DEL commands to register and unregister colormap funtions.
author Carnë Draug <carandraug+dev@gmail.com>
date Wed, 16 May 2012 16:52:08 -0400
parents f205d0074687
children 5f1d4def40e1
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1 ## Copyright (C) 2012 Rik Wehbring
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{map} =} lines ()
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21 ## @deftypefnx {Function File} {@var{map} =} lines (@var{n})
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22 ## Create color colormap. This colormap is composed of the list of colors
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23 ## in the current axes "ColorOrder" property. The default is blue,
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24 ## green, red, cyan, pink, yellow, and gray.
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25 ## The argument @var{n} must be a scalar.
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26 ## If unspecified, the length of the current colormap, or 64, is used.
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27 ## @seealso{colormap}
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28 ## @end deftypefn
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29
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30 ## PKG_ADD: colormap ("register", "lines");
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31 ## PKG_DEL: colormap ("unregister", "lines");
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32
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33 function map = lines (n)
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34
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35 if (nargin == 0)
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36 n = rows (colormap);
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37 elseif (nargin == 1)
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38 if (! isscalar (n))
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39 error ("lines: argument must be a scalar");
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40 endif
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41 else
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42 print_usage ();
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43 endif
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44
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45 C = get (gca, "colororder");
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46 nr = rows (C);
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47 map = C(rem (0:(n-1), nr) + 1, :);
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48
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49 endfunction
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50
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51
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52 %!demo
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53 %! ## Show the 'lines' colormap as an image
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54 %! image (1:64, linspace (0, 1, 64), repmat ((1:64)', 1, 64));
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55 %! axis ([1, 64, 0, 1], "ticy", "xy");
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56 %! colormap (lines (64));
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57