RooFit plot

Roofit and RooStats
1

Hello,

I did a decay time fit with per event error with error as conditional variable.
and then when plotting the graph,I use the code with ProjWData(RooArgSet(*tzerror,*mass)).

The given plots shows very bad results for chi2/ndof ~4.8 for Root version before (with) 5.26 while for the Root version 5.27, the plot and chi2/ndof~0.97 looks good.

can anyone tell what is changed between the two version and which one is correct?

Cheers
Wenbin

2

Hi,

Can you a bit more specific about what changed? Is the plot (projection) identical, but just the chi^2 different, or is the plot also different?

Wouter