Variables are usually a single number for each signal or background. I’m wondering if it’s possible to consider a distribution of some physics quantities as an individual variable in TMVA. For example, if I’m interested in distinguishing the alpha signal and electron signal in liquid scintillator, in addition to common variables like original momentum and deposited energy, I may also include the time distribution of the optical photons for each event. Then, is this “variable” able to be added? Thank you for your help!