TRooFit is a collection of pdf classes for RooFit, that are designed to behave like objects from ROOT. For example, TRooFit introduces:
- TRooH1D : A pdf (inherits from RooAbsPdf) that you can fill and draw like a TH1D. The value of this object is a DENSITY.
- TRooHF1D : A function (inherits from RooAbsReal). The value of this object is a VALUE.
- TRooHStack : A sum of TRooH1D (or any other RooAbsReal) ... think of it as a stack of histograms
- TRooHPdfStack : Like a TRooHStack but only accepts (extended) pdfs, and ensures each is normalized individually in the summation, i.e. pdfValue = Sum(i) coef_i*pdfValue_i, where coef_i is the fraction of total expected events of that pdf. The coef_i are automatically recomputed
Setup any release that has ROOT, e.g. AthAnalysis, and then use acm to clone this package and compile it (this will compile the master version of TRooFit)
mkdir build source
cd build
acmSetup AthAnalysis,21.2,latest
acm clone_project TRooFit will/TRooFit
acm compile
To checkout the master, just omit the last argument in the clone_project command.
Example notebooks are available to help you get started ....
1a. Building a simple s+b model 1b. Model building with TRooWorkspaces
2a. Model inspection general demo
2b. Obtaining yields and uncertainties
2c. Parameter estimation and systematic breakdown
