Hi Rene, > The option to call "SIMPLEX" could be easily added. I am just curious > to know why you want to use SIMPLEX instead of MIGRAD (MIGRAD calls > SIMPLEX internally). I want to use SIMPLEX because my professor wants me to do so... (That's quite a strong argument, isn't it?) According to him, SIMPLEX can find a minimum more easily than MIGRAD if the initial parameters are very much off. He wants to obtain a first guess of the parameters with SIMPLEX and then feed these parameter values to MIGRAD. But if you are right then we really do not need to start with SIMPLEX. Cheers, Bertalan > > Note that you can call directly the Minuit function mnsimp > via gMinuit->mnsimp(). You can see examples of direct calls to Minuit > or the TFitter in $ROOTSYS/tutorials/Ifit.C > > Rene Brun > > Bertalan Juhasz wrote: > > > > Dear Rooters, > > > > I would like to fit histograms starting with the SIMPLEX method instead of > > the default MIGRAD (which if called by TH1::Fit()). Is there a way to do > > this? A SIMPLEX function is persent in TMinuit but I couldn't figure out > > how to access and use it. > > > > Thanks in advance, > > > > Cheers, > > > > Bertalan >
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:38 MET