How to generate a surface by a function defined by two sentences?

2021 7 21

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I would like to generate a graphic like this:

(I'm using >> [X,Y]= meshgrid(0:0.01:1,0:0.01:1);

surf(X,Y,X.*Y);

colorbar. To generate this figure).

But for a function defined by two sentences:

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Walter Roberson 2021-7-21

z = cos(2*pi*Y);
mask = X>0;
z(mask) = z(mask) + X(mask).^2.5;
surf(X, Y, Z)

It worked, thanks

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R2021a

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