Re: Map the chi2

Hi Manuel,

  you can either scan a single parameter around the minimum, (command SCAN in Minuit) or build contours for two parameters, like in fitcont.C. I think contours will give you the best way for maping the chi2 around the minimum.

  Cheers

  Lorenzo
On Mar 10, 2008, at 7:20 PM, Manuel Mussini wrote:

> Hi,
> I have a TH1D and a 3 parameters user defined TF1 to fit it.
> Which is the best way to map the chi2 around the convergence point?
> I thoughed to map the 3 parameters in pairs (fix one of them and
> scan the other two) but it not so clear (to me!) how to implement
> the mapping!
> I’ve tried the fitcont.C tutorial but this is not what I want!
>
> Thanks!!!
>
> Bye…
Received on Mon Mar 10 2008 - 23:14:25 CET