tree2array does not support selections based on vector sizes?

[RohithKarur]

Hello,

I tried creating an array from a tree with each entry being a vector. I want to filter by setting a condition that the vector's size needs to be 1, like this: tree2array(ttree,branches=["ph"],selection="ph.size >1"), where ph is the entry in question. However, everytime I use ph.size specifically, the program always crashes. Is there a possibility of a bug or am I doing something wrong?

Thank you!

[kratsg]

Did you try @ph.size() > 1?

[RohithKarur]

Yes this worked. Thank you! Also, do you know by any chance how to denote the absolute value of a quantity within a selection?

[kratsg]

Doesn't $Abs work? All of these questions are ROOT-specific, rather than root-numpy specific fyi.