Hello experts, I hope you can help me pls
I am using the basic TMVA script (https://root.cern/doc/master/ClassificationKeras_8py.html) from the tutorial to test the NN training on my own root files.
The script runs well with the example, however when I use my own root file as input I get the following errors:
: Expression: MyBranch1 does not provide data for this event. This event is not taken into account. --> please check if you use as a variable an entry of an array which is not filled for some events (e.g. arr when arr has only 3 elements).
: If you want to take the event into account you can do something like: “Alt$(arr,0)” where in cases where arr doesn’t have a 4th element, 0 is taken as an alternative.
Error in TTreeFormula::Compile: Bad numerical expression : “MyBranch1”
: Expression MyBranch1 could not be resolved to a valid formula.
***> abort program execution
Traceback (most recent call last):
File “./ClassificationKeras.py”, line 63, in
Exception: void TMVA::TrainAllMethods() =>
FATAL error (C++ exception of type runtime_error)
This error Warning/Error is repeated for all my branches
I am clueless in these issues but I guess this is about the fact that my branches are of type vector while the root example file used in the tutorial has F type of branches?
I see that the error suggest assigning the value 0 in cases it is missing input, but I am not sure I would want that, and also I am not sure where in the script I should put it
If anyone has an idea it will be super helpful… preferably for dummies pls
Many thanks in advance