Dear all,
is it possible to do combined fits of 2dgraph (as it is possible with TGraph via TMultiGraph::Fit) ?
(I mean, without writing the chi2 myself and minimizing with general minuit2 package)
Thanks
clingcurious
Dear all,
is it possible to do combined fits of 2dgraph (as it is possible with TGraph via TMultiGraph::Fit) ?
(I mean, without writing the chi2 myself and minimizing with general minuit2 package)
Thanks
clingcurious
to be more precise, I would to do a combined fit :
Z=f_(a,b) (X,Y)
Z’=g_(a,c) (X’,Y’)
f and g are highly non linear and TMultiGraph::Fit does not work for TGraph2D (AFAIK)
but I do not know if there exist something similar to
TMultiGraph *mg = ...
TGraph *graph1 = ...
TGraph *graph2 = ...
TF1 *model = ...
mg->Add(graph1) ;
mg->Add(graph2) ;
mg->Fit(model) ;
mg->Draw("AP") ;
but for TGraph2D
Hi,
We don;t have a TMultiGraph for 2D objects. But if you just want to fit, joy can create a new temporary TGraph2D where you copy all the points from the single TGrpah2D objects
Lorenzo