Error using contour: Z must be at least a 2x2 matrix.

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 2x2 matrix.

Answer 1

[Andrei Bobrov]

Your typo

Should be:

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

[geometry geometry]

What a bad typo... thanks

is there a way to make two figures (two windows) in one code ?

for example one figure with mesh and the other with contour.

[Steven Lord]

Use the figure function to open a new figure window, or use subplot to create two or more separate axes in one figure window.