Finding the adjusted R2 and SSE of distribution fitting

Dear,

I am fitting several data points to a distribution and I need to find the adjusted R2 and SSE of the fitting. The distribution fitting app doesn't include this feature. How can I calculate these two parameters? Is there a function dedicated to this? If not, could anyone give me a formula to compute it programmatically, say, in a script looping through all the files? I have searched the internet, but to no avail.

Thanks!