Mercurial > octave-nkf
annotate scripts/image/lines.m @ 20654:b65888ec820e draft default tip gccjit
dmalcom gcc jit import
author | Stefan Mahr <dac922@gmx.de> |
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date | Fri, 27 Feb 2015 16:59:36 +0100 |
parents | 7503499a252b |
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1 ## Copyright (C) 2012-2015 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 @qcode{"ColorOrder"} property. The default is blue, |
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24 ## green, red, cyan, pink, yellow, and gray. |
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25 ## |
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26 ## The argument @var{n} must be a scalar. |
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27 ## If unspecified, the length of the current colormap, or 64, is used. |
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28 ## @seealso{colormap} |
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29 ## @end deftypefn |
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30 |
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31 ## PKG_ADD: colormap ("register", "lines"); |
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32 ## PKG_DEL: colormap ("unregister", "lines"); |
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33 |
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34 function map = lines (n = rows (colormap ())) |
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35 |
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36 if (nargin > 1) |
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37 print_usage (); |
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38 elseif (! isscalar (n)) |
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39 error ("lines: N must be a scalar"); |
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40 endif |
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41 |
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42 if (n == 1) |
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43 map = [0, 0, 1]; |
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44 elseif (n > 1) |
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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 else |
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49 map = zeros (0, 3); |
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50 endif |
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51 |
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52 endfunction |
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53 |
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54 |
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55 %!demo |
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56 %! ## Show the 'lines' colormap as an image |
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57 %! image (1:64, linspace (0, 1, 64), repmat ((1:64)', 1, 64)); |
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58 %! axis ([1, 64, 0, 1], "ticy", "xy"); |
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59 %! colormap (lines (64)); |
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60 |