Re: Error bars

From: Rene Brun <Rene.Brun_at_cern.ch>
Date: Tue, 25 Aug 2009 16:28:27 +0200


Hi Patrick,

This is a very strange report. What do you expect that we can do with it? Minuit is a very serious algorithm. If you find something better, let us know.
Our experience is that a wrong output from Minuit is typically coming from a badly expressed minimization function. If you can extract what is relevant from us from the complexity of your stuff, let us know, we are willing to help once you send some concrete material that we can use to investigate your problem.

Rene Brun

Patrick Dupre wrote:
> Hello,
>
> I already mentioned in the past that the error bars issued from Minuit2
> were not satisfying.
> I would like to know how we can make progress, but one point is that I
> cannot easy give my application because Minuit calls are integrated
> inside
> a big application, and the fitting part requires a call to a perl
> subroutine. However, I can run some tests (and recompile the Minuit2
> code) if somebody has the willing to take it seriously.
> My present concern is that I am publishing the fitted data, mentioning
> Minuit package, but I also have to say that I am not able to publish the
> error bars issued from Minuit.
>
> Thank
>
Received on Tue Aug 25 2009 - 16:27:55 CEST

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