>> clear all
>> [X,Y] = meshgrid(-2:.01:2,-2:.01:2);
>> Z=1./X+1./Y;
Warning: Divide by zero.
Warning: Divide by zero.
>> figure(1),mesh(X,Y,Z)
>> figure(2),contour(Z,1)
??? Error using ==> contourc
Contour levels must be finite.
Error in ==> specgraph.contourgroup.schema>LdoDirtyAction at 256
refresh(h);
??? Error occurred while evaluating listener callback.
>> figure(2),contour(Z,.99)
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