How do you find the bin index in a THn

ROOT
1

Hi ROOTers,
I want to get the content of a specific bin in a THn (or THnSparse). I can locate the bin on each axis by doing

myTHn->GetAxis(2)->FindBin(34)

(numbers here are jusrt an example) but then I can not use the GetBinContent(bin) function, since it requires as input the global bin index and not one index for each axis.
Is there a way to do this?

_ROOT Version: 6.18/00
_Platform: Linux 3.10.0-1127.13.1.el7.x86_64

2

Hi Riccardo,
I bet @moneta can help!

Cheers,
Enrico

3

@eguiraud thanks.

In the meantime I found that the THn::GetBin(const Int_t* idx*) function seems to do what I need.
Of course, if you or anybody else knows a better way of doing it, I’d be happy to hear.

1 Like
4

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