Date: Jun 8, 2010 1:33 AM
Author: Tim Balmer
Subject: 2D gaussian fitting using Surface Fitting Tool

I'm trying to fit a 2D gaussian to a surface using the Surface Fitting Tool.  I choose the custom equation option and enter this formula:  A*exp(-x^2/(2*sigmax^2)-y^2/(2*sigmay^2))

I think that either my equation is wrong or I am not using the Surface Fitting Tool properly because it generates a flat surface that doesn't fit at all and has a negative R-square value.

Any help would be greatly appreciated!