Colormap not working: is it too long?

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Christopher
Christopher 2015-5-31
评论： Image Analyst 2015-6-1
When I use the following colormap, cmap1, I only get two colors displayed in my figure. Why does Matlab hate my colormap?
cjet = [jet];
njet = numel(cjet(:,1));
c0 = 0.2;
cm = 0.3;
c1 = 1.0;
wn = round(njet*(c1-c0)/(cm-c0)-njet)+1;
stp = 1/(wn-1);
jet2white = [(1-(stp:stp:1)')*0.5 zeros(wn-1,1) zeros(wn-1,1)];
cmap1 = [cjet; jet2white];
figure; imagesc(rand(100,100)); colormap(cmap1); caxis([0 1]);

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回答（1 个）

Image Analyst
Image Analyst 2015-5-31
I get more than 2 colors, but anyway, your cmap1 is 512 rows long. It should be 256 rows long. I believe it just ignores the second 256 rows.
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Mike Garrity
Mike Garrity 2015-6-1
The Windows 256 color limitation was removed in R2014b.
Image Analyst
Image Analyst 2015-6-1
Christopher, what operating system and version of MATLAB are you using?

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