Re: fitting problem

From: Arthur E. Snyder <snyder_at_slac.stanford.edu>
Date: Fri, 9 Feb 2007 10:45:49 -0800 (PST)


You should prob. take a look at roottalk guidlines. Your're way out of them here.

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On Fri, 9 Feb 2007, Roger Mason wrote:

> Hello rooters,
>
> I'm trying to fit a TGraph of 2775 points generated by combination of 4 gaussians +
> noise. The fit does not converge:
>
> root [1] **********
> ** 5 **MIGRAD 5000 0.002775
> **********
> CALL LIMIT EXCEEDED IN MIGRAD.
> MIGRAD TERMINATED WITHOUT CONVERGENCE.
> FCN=1328.43 FROM MIGRAD STATUS=CALL LIMIT 11189 CALLS 11190 TOTAL
> EDM= unknown STRATEGY= 1 NO ERROR MATRIX
>
>
>
> A fit to a similar spectrum with only 3 gaussians converges OK.
>
> What do I need to tweak to get this to work?
>
> Thanks,
> Roger
>
>
Received on Fri Feb 09 2007 - 19:47:52 CET

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