why can't i plot this function? :(

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Hassan Dehghani 2014-5-29

评论： Hassan Dehghani 2014-5-29

I'm trying to plot this function. It gives me the following error.

Warning: Matrix is singular to working precision

I'm using Matlab 2011a.

G=@(x1,x2)(-(1+cos(12*sqrt(x1^2+x2^2)))/(0.5*(x1^2+x2^2)+2));

x=-5:.1:5; y=-5:.1:5; [x1 x2]=meshgrid(x,y);

mesh(x2,x1,G(x1,x2))

David Sanchez 2014-5-29

Try it this way:

x = -5:.1:5; 
y = -5:.1:5; 
[x1 x2] = meshgrid(x,y);
G2 = -(1+cos(12.*sqrt(x1.^2+x2.^2)))./(0.5.*(x1.^2+x2.^2)+2);
mesh(x2,x1,G2)

Hassan Dehghani 2014-5-29

tnx man, saved my day :)

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