Thread Subject: ezsurf ('cos (x^2 + y^2)')

Any idea why

ezsurf ('cos (x^2 + y^2)')

displays all these "undefined" white areas?

"Joerg Buchholz" <buchholz@hs-bremen.de> wrote in message <gsaeba$m39$1@fred.mathworks.com>...
> Any idea why
>
> ezsurf ('cos (x^2 + y^2)')
>
> displays all these "undefined" white areas?

% I don't they are "undefined".
% I believe they are just not "sampled" densly enough.
% Or its just an "optical illusion".

% Try this:

ezsurf ('cos(0.1*(x^2 + y^2))')

% There are still "white spaces" but they are "defined".

Try

ezsurf ('cos (x^2 + y^2)',200)