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

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

[Mohammad Sami]

f = figure;

set(f,'Color','white');

[Walter Roberson]

Also remember that axes have a color different than figures.

[Image Analyst]

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

[J. Alex Lee]

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)

It's also a bit less obstrusive, e.g., doesn't alter existing axis limits

But to be honest, at the time I was interested in pcolor, I completely forgot about the AlphaData property of the image functions.