来自http://www.aos.wisc.edu/~dvimont/matlab/Graphics_Tools/color_rain.html
Listing of script color_rain
cmap = [ ...
1.0000 1.0000 1.0000
0.6667 1.0000 0.6667
0.3333 1.0000 0.3333
0 0.9192 0
1.0000 1.0000 0
1.0000 0.5000 0
0.8000 0 0
];
colormap(cmap);
mycmap =
1.0000 1.0000 1.0000
0.9333 0.9333 0.9333
0.8000 0.8000 1.0000
0.7020 0.7804 1.0000
1.0000 1.0000 0
1.0000 0.5000 0
1.0000 0 0