How to get different variable rankings for TMVA BDTG

TMVA
1

I am currently training a BDTG with k-fold cross-validation. After all the folds are trained, I am able to get an input variable ranking that uses ‘Separation’ as the metric:

                         : Ranking input variables (method unspecific)...
IdTransformation         : Ranking result (top variable is best ranked)
                         : --------------------------------------------------
                         : Rank : Variable                  : Separation
                         : --------------------------------------------------

I have seen both in the TMVA Users Guide and in some other Root Forum examples (e.g. https://root-forum.cern.ch/t/the-rank-of-variables/28339) that other metrics are available, one being ‘Variable Importance.’ How do we switch between different types of rankings? Is there some option to do this?

Thanks!
Thomas

2

Hi Thomas,

Thanks for the post.
Let me add @moneta in the loop.

Cheers,
D