Tefficiency fitting with bin size error

ROOT
1

Hello all,
I am using the Tefficiency class with kFNormal statistics that I’m fitting to an erf to. I’ve included a plot of the with the fit line and error bars shown with the horizontal bars being the bin size. Now is there a way of fitting that would include the x uncertainty? I haven’t been able to find anything, any help would be greatly appreciated!

Thanks,
Simon
effPlot_dtmThres_6000.pdf (18.7 KB)

2

Hi,

When fitting a TGraphErrors the horizontal uncertainty are taken into account. But if these are bins, it is WRONG to include them. It is correct if its x variables is an independent measurement which contains an uncertainty (e.g. when plotting pressure measurements vs temperature measurements). This is not the case of an histogram representing counts

Best Regards

Lorenzo

3

Thanks, yeah bit of a dumb question