postprocessing of results

Hello,

I have a working3D Model in Comsol4.3b.
This model gives me the 3D electrig field of an electrode array.

To evaluate this model I want to do some postprocessing im Matlab.
Especially an FFT over the values of a horizontal cut plate through the resulting field.

To do so I saved my model as a m-file and rund this into matlab.
But I did not get how I can access te data of the resulting field to perform my postprocessing eg. fft on the resulting data.

I can plot my data via matlab but I cannot directly access them.

Can anyone give me an hint?

regards Viola