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TMVA Multiclass probability

Hello everyone!
I am currently working on a multi-class classification problem using BDTG (Boosted Decision Tree Gradient). I would want to add the probability of a classifier per event. For example, I would want my classifier to say: “There is a 80% probability that this event belongs to class B”. How do I do that?

Hi @lara.kamal,
and welcome to the ROOT forum!
I am afraid this post slipped through the cracks! @moneta, our TMVA expert, can probably help.

Cheers,
Enrico

Hi Lara,

You would determine the classifier performance on a given sample. That tells you its efficiency and mis-classification rate for events similar to that sample.

Cheers, Axel.