Thread Subject: Gauss' regression of a 2D-Dataset looking similar to the Matlab-Symbol

Hallo,

given a 2D-Dataset with f(x1,x2)= y (see link to fig. below), the curve along each of the axis x1 and x2 follow a gaussian curve. In the 3D fig. this resembles a lot the matlab-symbol.
The problem is to describe Y as a function from x1 and x2 by regression analysis of a gaussian type. How can I derive the gauss-parameters from regression analysis which accounts for x1 and x2. The matlab function fit with regression type "gauss1" provides a working solution along one axis (either x1 or x2) but does not allow for 2 independent variables. Which matlab function should I use ?
Thank You very much!

http://www.matheplanet.com/matheplanet/nuke/html/uploads/8/25556_show2.jpg
<img src=http://www.matheplanet.com/matheplanet/nuke/html/uploads/8/25556_show2.jpg alt="fig">