message: Modifications to run the trending with root6
diff: @@ -7,7 +7,7 @@ TGraphErrors * MakeGraphSparse(TTree * tree, const Char_t * expr="mean-fdelta:ru
  //
  const Int_t entries = tree->Draw(expr,cut,"goff");
  - if (entries<=0) return;
  + if (entries<=0) return 0x0;
  Double_t *graphX, *graphY, *graphError;
  //check whether error argument exists in expr
  @@ -90,7 +90,7 @@ TGraphErrors * MakeGraphSparse(TTree * tree, const Char_t * expr="mean-fdelta:ru
  }
  //------------------------------------------------------------------------------------------------
  -drawPerformanceT0QATrends(const char* inFile = "trending.root", const char* runType="pp") {
  +void drawPerformanceT0QATrends(const char* inFile = "trending.root", const char* runType="pp") {
  //
  //
  gROOT->Reset();
  @@ -111,13 +111,13 @@ drawPerformanceT0QATrends(const char* inFile = "trending.root", const char* runT
  cout<<"number of entries "<<entries<<endl;
  TH1F *frame = new TH1F();
  - //const float norm_runs = 8.0;
  + float norm_runs = 10.0;
  if(entries<8)
  - const float norm_runs =10.0;
  + norm_runs =10.0;
  else if(entries>=8&&entries<16)
  - const float norm_runs =20.0;
  + norm_runs =20.0;
  else
  - const float norm_runs =50.0;
  + norm_runs =50.0;
  int const canvas_width = int(((entries*1.0)/norm_runs)*2000.0);
  if(entries>50){
  gStyle->SetTickLength(0.03*norm_runs/(entries*1.0),"Y");
  