pyhf.readxml.extract_error

pyhf.readxml.extract_error(hist: uproot.behaviors.TH1.TH1) → list[float]

Determine the bin uncertainties for a histogram.

If fSumw2 is not filled, then the histogram must have been filled with no weights and .Sumw2() was never called. The bin uncertainties are then Poisson, and so the sqrt(entries).

Parameters:

hist (uproot.behaviors.TH1.TH1) – The histogram

Returns:

The uncertainty for each bin in the histogram

Return type:

list