TMVA tutorials can only run once?

TMVA
1

Hi ROOTers,

My first question in this forum. I run the code under directory of tutorial/tmva, such as “root -l TMVAClassification.C”. After it completes, I will go into the interface of root. But when I want to run it again “.x TMVAClassification.C”, it will complain. Could anyone tell me why is that? (my ROOT is the latest version on OS.)

I’ve write a GUI so that when I press the button of “MLP”, it will run “.x TMVAClassification.C(“MLP”)”. For the reason above, I can only press the buttom once. So how can I fix that?

Cheers,
Reyn

2

Macro unloading / reloading does not work in (is not supported by) ROOT 6 (as of 2019.06.12).

After the macro is loaded, you can try to execute the function again: TMVAClassification("MLP");

3

Thanks for reply!

So you mean that I should run “.L TMVAClassification.C” first, and then I can run “TMVAClassification(“BDT”)” whatever times I want. That really works! In this way, I should set a button in my GUI to run “.L TMVAClassification.C” as the first step if I want to use this GUI, and then press “BDT”, “MLP” and so on. Thank you very much!

Cheers,
Reyn

4

Actually, for the first time, you can simply .x TMVAClassification.C or .x TMVAClassification.C("BDT") but later you must not use “.x” not “.L” for the same file again.

5

I see. So I modified my GUI.C that I added a line “gROOT->ProcessLine(”.L TMVAClassification")" and then set the buttons to run like “TMVAClassification(“BDT”)”.

Thank you so much!

Reyn