[quote=“moneta”][quote]
Is there a way to fit a TGraphErrors with non-zero “x-uncertainties” (e.g. from bin widths) with the integral option?
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No, this is not currently possible in ROOT. But, let me understand better and if this makes sense. What exactly are your data points x and y ?
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I tried to do something similar, I posted my attempts here Fitting a TGraphAsymmErrors with the integral option but received no answer.