Re: Fitting Basics

From: Pasha Murat at (630)840-8237 (murat@ncdf41.fnal.gov)
Date: Wed Nov 10 1999 - 21:17:23 MET


Philip:

you may want to take a look at http://root.cern.ch/root/Tutorials.html, 
tutorial#16. In general it is a good idea to read ROOT tutorials.

					-best, pasha

Philip M Borawski wrote:
> 
> Please excuse my newbiness here, but I have some very basic questions on
> fitting signal plus background interactivley.
> 
> First question, is there a way to set parameters to predefined functions
> (gaus for instance)?
> 
> Next, is there a way to interactivley optimize the fit of this 'first
> guess'?
> 
> This is motivated by common fitting methods in PAW.  For
> instance to fit signal+background in PAW one would (for example) do
> somthing like:
> 
> ve/cr p(7) r 120 1.860 .015 1 1 1 1
> h/fit 222 g+p3 m 7 p
> 
> and then inside minuit
> 
> fix 2,3
> mini
> impre
> 
> Is there an anolog to this method in ROOT?
> 
> Any examples or comments would be greatly appreciated.
> 
> Thank you in advance
> 
> Philip Borawski
> University of Texas at Dallas
> SLAC/BaBar Collaboration



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