Rootpy and multidimensional array branches

[LeWhoo]

Hello,

I realise that rootpy is not an official part of ROOT, however this place still seems like the best place to ask.

Is it possible to create branches with multidimensional arrays in rootpy?

Also, is variable length (for 1D arrays) working in rootpy? I’ve tried it, but it seems that the array is always fixed to the initial size, even in the samples.

I just wanted to make a creation of simple trees easier in pyroot, but I am not sure if I made a good choice…

Thanks!

[etejedor]

Hi @LeWhoo

Here’s how you would do it with PyROOT:

Store 2D array into TTree use python

I want to store 2D array of float numbers in a Tree use python. Ideally, the 2D array has 1D fixed (8 elements) and the other dimension not fixed. But I’ll be happy even if two dimensions all with fixed length. Can anybody help or point me to some useful resource? Thanks. I figured out how to store a 1D array, use a 1D vector. But could not find a solution for 2D array in python.

The variable length of one of the dimensions is provided by another branch.

Cheers,
Enric