Condition in Tcut in TMVA

TMVA
1

Hello root family,

I’m working in my TMVA, following the TMVAtutorialClassification https://root.cern.ch/doc/v610/TMVAClassification_8C.html.

But I need to work with values < 0.5, for this I created a Variable (Branch) with random numebers between 0 and 1,

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my question is that I do not know how to put this condition in the TCut,

TCut mycuts = “”; //<0.5
TCut mycutb = “”;
dataloader->PrepareTrainingAndTestTree( mycuts, mycutb,
“SplitMode=Random:NormMode=NumEvents:!V” );

I tried just TCut mycuts=“Numeracion2 < 0.5” , but I’m not sure if the dataloader are tacking the correct events.

Thanks for your time

2

Hi,

If you want to apply the same cut on both signal and background, you can do as following

TCut mycuts = "Numeracion2 < 0.5";
TCut mycutb = mycuts; 
dataloader->PrepareTrainingAndTestTree( mycuts, mycutb,"SplitMode=Random:NormMode=NumEvents:!V");

If you have problems doing this , please let me know

Lorenzo

3

Thanks Moneta, I already did that, to put both with

"Numeracion2 < 0.5"

and is working.