ModifyHistogramInWorkspace

Replace a histogram inside a RooFit workspace by manipulating the RooDataHist inside a RooHistFunc

Usage:

+ModifyHistogramInWorkspace {
  +HWWVBF{
     <histFunc = "sigVBF_SR_HWWRun2VBF_Hist_alphanominal">
     TH1F("histogram","histogram",7,0,7) << 7@{0+-0, 36.61+-0.18, 41.41+-0.19, 20.92+-0.14, 23.12+-0.14, 21.11+-0.14, 20.00+-0.14, 39.27+-0.19, 0+-0};
     <histName = "histogram">
  }
}

The following information/tags are required

• histFunc: name of the RooHistFunc to be modified in the workspace
• histogram definition: Definition of histogram that should replace the existing one in the workspace
• histName: name of above defined histogram