I am doing a shape analysis using the RooWorkspace class, with a PDF defined from histogram distributions for signal and background. Up to now I implemented flat systematic for the background distribution. What I would like to do now is to introduce a bin-by-bin systematic for the background.
I know that there is a tool named HistFactory, but I was wandering if it is possible to do it in the workspace that I made and if someone can point me to examples/tutorials where this is done.
Thank you very much in advance.