Scale one branch in created Tree

[Noor1]

Dear all

I want to scale one branch from a created Tree file.

I created three Branches in Tree

    Tree->Branch("E_0",&sg0,"sg0/I");_
    Tree->Branch("E_1",&sg1,"sg1/I");_
    Tree->Branch("Sum",&sum,"s/I");_

then I created a loop and fill the events in the tree branches in one step

    Tree->Fill();

at the end of the loop I wrote the tree file and closed it

   TreeFile= Tree->GetCurrentFile();_
   TreeFile->Write();_
   TreeFile->Close();_

my question is how can I scale (divide it by 70) only the last branch in the tree (sum) directly after filling the tree?? and keep the first two branches

Thanks in advance

[couet]

If you know you want to fill the tree not with sum but with sum/70 why don’t you do this scaling operation before filling ?

[Noor1]

I am not sure that this is correct, this will change the value of the sum by sum/70
what I want is to change the total number under each bin by 70

thanks

[couet]

@Noor1

I want is to change the total number under each bin by 70

So you want to act on the histogram result (after TTree::Draw or TTree::Project ) ? A tree has no “bins” …

[Noor1]

yes, thank you. I moved to histogram.
I thought it is possible under tree spectrum

Many thanks for clarifications