1function sample_colormap
2%SAMPLE_COLORMAP try a colormap for use in cspy
3%
4% Example:
5%   sample_colormap
6% See also: testall
7
8% Copyright 2006-2012, Timothy A. Davis, http://www.suitesparse.com
9
10h = jet (64) ;
11h = h (64:-1:1,:) ;
12h = h (20:end,:) ;
13
14% h = h (17:128,:) ;
15
16% s = sum (jet,2) ;
17% h (:,1) = h (:,1) ./ s ;
18% h (:,2) = h (:,2) ./ s ;
19% h (:,3) = h (:,3) ./ s ;
20
21h (1,:) = [1 1 1] ;     % white
22h (2,:) = [1 1 .8] ;    % light yellow
23
24% h
25colormap (h) ;
26
27clf
28subplot (5,1,1) ;
29image (1:size(h,1)) ;
30
31h = rgb2hsv (h) ;
32% h (:,3) = linspace (1,0,64) ;
33% h= hsv2rgb (h) ;
34
35subplot (5,1,2)  ; plot (h(:,1)) ; axis ([1 64 0 1]) ; ylabel ('red') ;
36subplot (5,1,3)  ; plot (h(:,2)) ; axis ([1 64 0 1]) ; ylabel ('green') ;
37subplot (5,1,4)  ; plot (h(:,3)) ; axis ([1 64 0 1]) ; ylabel ('blue') ;
38subplot (5,1,5)  ; plot (sum(h,2)) ; axis ([1 64 0 3]) ; ylabel ('sum') ;
39
40