How do I set back color of figure by pcolor to white?

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Ting Zheng 2020-2-1

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https://ww2.mathworks.cn/matlabcentral/answers/503101-how-do-i-set-back-color-of-figure-by-pcolor-to-white

评论： J. Alex Lee 2020-2-3

I try to use set(h,'defaultfigurecolor','white'), but it can't set the background color of figure by pcolor to white.

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Image Analyst 2020-2-2

I'm curious as to your reasons for using pcolor() rather than image, imagesc() or imshow()? What are they?

J. Alex Lee 2020-2-3

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pcolor naturally treats NaN as missing, which might be what OP needs considering the discussion about background color. Drawback is that you can't set linestyle in-line, but you could argue the pcolor way is simpler:

% C is an image with NaN's meant to be transparent
h1 = pcolor(C);
C.LineStyle = 'none';
% vs
AData = ones(size(C));
AData(isnan(C)) = 0;
h2 = imagesc(C,'AlphaData',AData)