How can I give a Matlab function (or file) as input of COMSOL?

Hi all,
does anyone know how can I give a Matlab function (or file) as input of COMSOL?
Particularly, I need to simulate in COMSOL an anisotropic medium with ε and μ varying with r and Φ (cilindrical coordinates). Any suggestion will be helpful.
Thank in advance.

hi, iaia,
for cloaking? :P
yes, you can do that, at least, with x and y

Hi lxcd,
thanks for your answer. I have solved the problem in cylindrical coordinates.
Bye