Three-Dimension plot

[FeBarbosa]

Hi everyone,

I'm trying to show a graphics of functions. So, with function with one
minimum, the plot is ok, but with some functions with two minimum, the
graphic doesn't represent the function. Below is my code:

%------------------------------------------------------
x = y = -10:0.1:10;
[x, y] = meshgrid(x, y);
z = (x - 1).^2 * (x - 2).^2 + (y - 1).^2;
mesh(x, y, z);
%------------------------------------------------------

The output:

<http://octave.1599824.n4.nabble.com/file/n4679745/erro.png> 

The output expected:

<http://octave.1599824.n4.nabble.com/file/n4679745/expected.gif> 






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