first version of ttbar2b fraction extractor
b tagging efficiency study
data driven way b tagging efficiency
macro from Suyong to extract b-tagging efficiency from fitting
extending extracttageff macro to get the ttbb fraction
add varianles for histogram for ttbar + 2b analysis
test
root plot style
macro for histogram
to merge each channel
for ana.C
to extract ttbb fraction
first verson of another extractor
add more feature to split sample in macro level
update
b tag scale factor
remove not used function
for 7 TeV macro
Speed up
more speed up by using list->GetN() and apply same for single draw