MATLAB: Error using contour: Z must be at least a 2×2 matrix.

Question

What's the problem with the following code?

f=input('enter function: ','s');
f = str2func(['@(x,y)' vectorize(f)]);
[X,Y]=meshgrid(-10:.5:10);
contour(X,Y,f(x,y));

When I enter sin(x)+cos(y) the following error occurs:

Z must be at least a 2×2 matrix.

Answer 1

Your typo

Should be:

contour(X,Y,f(X,Y));