Disabling some variables in a tree when loading the root file

ROOT
1

Dear Experts,

I am loading a fat root file. I want to dasable all variables except the variable which I am drawing. Could you please tell me how to do it?

Thanks,
Deepak

2

You can disable all branches using tree->SetBranchStatus("*", kFALSE);. Afterwards you can re-enable the branch you need with tree->SetBranchStatus("branch_name", kTRUE);.

Here is the relevant documentation:
https://root.cern.ch/doc/master/classTTree.html#aeca53bcd4482de1d883d259df6663920

3

Another common approach is to use the TTreeReader, see https://root.cern.ch/doc/master/classTTreeReader.html

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