Mesh : Display only nonzero values

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Joon Choi
Joon Choi 2021-2-5
评论： Joon Choi 2021-2-5
When I draw a 3D graph with a mesh, I only want to display non-zero values. What should I do?
Please help me!
Thank you.

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the cyclist
the cyclist 2021-2-5
Ran in:
In this code, I take the first example from the documenation for mesh, and don't plot the negative values by setting them to NaN:
[X,Y] = meshgrid(-8:.5:8);
R = sqrt(X.^2 + Y.^2) + eps;
Z = sin(R)./R;
Z(Z<0) = nan; % Set negative values to NaN, so that they are not plotted
figure
mesh(X,Y,Z)
You should be able to do the equivalent thing, with
Z(Z==0) = nan;

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