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

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geometry geometry 2017-5-13

评论： Steven Lord 2017-5-13

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.

Andrei Bobrov 2017-5-13

Your typo

Should be:

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

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 2017-5-13

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

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