Hi, I wonder whether it is intended to simply scale the fTsumw2 data member of TH1 if the TH1 is scaled by TH1::Scale(scale) as is the current implementation. This makes fTsumw2 and the sum of the squared errors of all bins differ after scaling. So I'd prefer scale it with the square of 'scale'. Cheers Gero ----------------------------------------------------------------------- Gero Flucke 1a / 603 DESY Notkestr. 85 22607 Hamburg +49-(0)40-8998-2454 Privat / private: ----------------- Von-Hutten-Str. 20 22761 Hamburg
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