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function sample_colormap
%SAMPLE_COLORMAP try a colormap for use in cspy
%
% Example:
% sample_colormap
% See also: testall
% Copyright 2006-2012, Timothy A. Davis, http://www.suitesparse.com
h = jet (64) ;
h = h (64:-1:1,:) ;
h = h (20:end,:) ;
% h = h (17:128,:) ;
% s = sum (jet,2) ;
% h (:,1) = h (:,1) ./ s ;
% h (:,2) = h (:,2) ./ s ;
% h (:,3) = h (:,3) ./ s ;
h (1,:) = [1 1 1] ; % white
h (2,:) = [1 1 .8] ; % light yellow
% h
colormap (h) ;
clf
subplot (5,1,1) ;
image (1:size(h,1)) ;
h = rgb2hsv (h) ;
% h (:,3) = linspace (1,0,64) ;
% h= hsv2rgb (h) ;
subplot (5,1,2) ; plot (h(:,1)) ; axis ([1 64 0 1]) ; ylabel ('red') ;
subplot (5,1,3) ; plot (h(:,2)) ; axis ([1 64 0 1]) ; ylabel ('green') ;
subplot (5,1,4) ; plot (h(:,3)) ; axis ([1 64 0 1]) ; ylabel ('blue') ;
subplot (5,1,5) ; plot (sum(h,2)) ; axis ([1 64 0 3]) ; ylabel ('sum') ;
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