constrain fit to prevent crashes

[u/mrichter/AliRoot.git] / PWGPP / TPC / AliTreeDraw.cxx

diff --git a/PWGPP/TPC/AliTreeDraw.cxx b/PWGPP/TPC/AliTreeDraw.cxx
index 3630be61265fc02a4898a50fae603ad1f173cebb..2430cf73a98881b472e0c344299b4e0dc1c97e0a 100644 (file)
--- a/PWGPP/TPC/AliTreeDraw.cxx
+++ b/PWGPP/TPC/AliTreeDraw.cxx
@@ -481,6 +481,7 @@ TH1F* AliTreeDraw::CreateResHistoII(TH2F* hRes2, TH1F **phMean, Int_t integ,  Bo
  
   // create the fit function
   TF1 * fitFunc = new TF1("G","[0]*exp(-(x-[1])*(x-[1])/(2.*[2]*[2]))",-3,3);
+  fitFunc->SetParLimits(2,0.0001,100.);
   
   fitFunc->SetLineWidth(2);
   fitFunc->SetFillStyle(0);