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Making holes

If a point is given the value NaN (Not-A-Number), then that point isn't displayed. This is useful if you want a 'hole' in your picture. 
z = peaks(20); 
z(4:8,4:8) = NaN*z(4:8,4:8);
surf(z)


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© Cambridge University Engineering Dept
Information provided by Tim Love
2006-07-24