Controlling error messages in ROOT::Minuit2

[Wile_E_Coyote]

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Minuit2 - PrintLevel in multi-threading

Dear all, I am using the C++11 std::thread library to minimise a functor with different parameters in each thread. I am tracking the “v6-02-00-patches” git branch. The minimiser is instantiated and used in each thread as chiSquared functor defined... ROOT::Math::Functor f(chiSquared, chiSquared.getNumberOfFreeParameters()); minuit(ROOT::Minuit2::kMigrad); minuit.SetFunction(f); for(unsigned k = 0; k<f.NDim(); ++k) minuit.SetVariable(k,"x_"+to_string(k),variable[k], step[k]); miniuit.Minimize()…

ROOT::Math::Minimizer turn messages off

Hello, I’m using ROOT::Math::Minimizer as discribed here to do a serie of function fitting (over 600k), minimizing the Chi-Square. Doing the fits I have several warning messages that I can’t turn off. These are: [ul]Info in : Minuit2Minimizer::Minimize : Minimization did NOT converge, Edm is above max Info in : Minuit2Minimizer::Minimize : Covar was made pos def [/ul] ROOT::Minuit2::Minuit2Minimizer* min = new ROOT::Minuit2::Minuit2Minimizer( ROOT::Minuit2::kMigrad ); min->SetMaxFunctionCa…

How to disable mimizer warnings

Hello, I’m calling Math::Minimizer with defaults parameters (ROOT::Math::CreateMinimizer("","")) several times and I can’t suppress all the warning. Although I use SetPrintLevel(-1), it remains a warning: MINUIT WARNING IN HESSE ============== MATRIX FORCED POS-DEF BY ADDING 0.156855 TO DIAGONAL. EIGENVALUES OF SECOND-DERIVATIVE MATRIX: Is it possible to suppress it ? Thank you, Benoit