Increasing ROOT::Math::Minimizer max number of parameter

ROOT
1

Hello,

I’m using a ROOT::Math::Minimizer object to perform a minimization procedure.
I call the default minimizer Minuit2 and the default algorithm Migrad.
Recently I increased the number of parameters to 160 and the programm is crashing when trying to set the function via: min->SetFunction(f);

My question is how can I increase the maximum number of parameters? I know there is a constructor of TMinuit with maxpar as an argument but that’s all I found and since I use ROOT::Math:Minimizer I don’t construct the TMinuit object myself.

Thank you very much,
Benoit

2

Hi,

There is no maximum number of parameter in the Minimizer (you are limited only by your computer memory)
So, it should not crash for n=160. Can you post a gdb trace from the crash or better, your code reproducing this crash?

Lorenzo