I discovered this File Exchange entry after seeing a question (note, the question is in Japanese) on MATLAB Answers. The user wanted to create a contourf with a particular color at a given range. There are probably a number of ways to achieve this, including the answer provided by Akira.
This entry by Yuxin gives the flexibility to specify non-uniformly spaced levels, as well as custom colormaps. Let’s take a look.
data = peaks;
First, a normal filled contour plot.
Next, let’s create a contour plot where the values between -1 and 1 are gray.
edges = -10:10; % create 20 levels cmap = parula(20); % create colormap cmap(10:11,:) = .5; % set the color corresponding to -1~1 to gray
Then we call contourfnu.
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