Re: minuit2 question

From: Lorenzo Moneta <>
Date: Wed, 19 Apr 2006 11:35:00 +0200

Hi Mike,

The "GRAD" option it is not implemented in both TFitterMinuit and TFitterFumili.
I will add it in the next days and it will be available in the CVS HEAD. It is however implemented directly in Minuit2 and that you can use it right now,



On Apr 15, 2006, at 9:46 PM, Mike Williams wrote:

> hi,
> it looks like the "grad" option (user supplied derivatives) is not yet
> implemented in TFitterMinuit, is this correct?
> i would like to be able to easily switch from minuit to fumili at run
> time, and the new implementation where TFitterFumili inherits from
> TFitterMinuit looks like it provides this ability in a natural
> way...however, i need to be able to supply the fitter with my
> derivatives
> for performance reasons.
> is there currently a way to do this with root? if not, is there any
> time
> table for adding the "grad" option to the minuit2 package?
> thanks,
> mike williams
Received on Wed Apr 19 2006 - 11:35:56 MEST

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