Please read tips for efficient and successful posting and posting code
Please fill also the fields below. Note that root -b -q
will tell you this info, and starting from 6.28/06 upwards, you can call .forum bug
from the ROOT prompt to pre-populate a topic.
ROOT Version: 6.28
Platform: win10
Compiler: visual c++
How to get the population standard deviation? not the sample standard deviation(TMath::StdDev).