Hello Rooters, I didn't find on ROOT WWW pages, what errors are taken into fitting of histogram. I understand that defaultly x is taken as bin center, sx is a half of bin width (?), y is a hight of bin, but what with sy. Is sy sqrt(hight_of_bin)? There seems to be tree possibilities in fit options: "" "W" Set all errors to 1 (that's seems to be clear) "E" Minos technique Would you be so nice to tell me what is meaning of default settings and mysterious Minos technique? Thank you in advance, Tadeusz -- Tadeusz Pytlos mailto:pytlos@fizwe5.fic.uni.lodz.pl Lodz, Poland
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