Dear folks,
I am just wondering why the result (particularly the fitted
parameter errors) of
(a) TH1::Fit("myFunc") and
(b) H1::Fit("myFunc","I")
seems to have little difference (~1% or less).
I expect a larger difference (not at this 1% level) since (b) accounts the
bin errors (???)
My questions:
1. In (a), what or how is the bin errors used in the fitting?
Is this the default (sqrt of bin content?)
2. In (b), how do we qoute the fitted parameters if we change the option
to "E"? I noticed that the MINOS errors(NEGATIVE/POSITIVE) are not exactly
same (at least slightly differ).
Like to understand these points. Any Hints?
Thanks in Advance...
--
Zaldy A. Nawang
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