Hi,
I’d like to store several arrays in a tree, and the lengths of the arrays is variable. Thus,
double var1[maxLength]; // first array to store
double var2[maxLength]; // second array to store
unsigned int var1n, var2n; // lengths of the arrays for a given event
tree->Branch("var1n",&var1n,"var1f/i");
tree->Branch("var2n",&var2n,"var2f/i");
tree->Branch("var1",var1,"var1[var1f]/D");
tree->Branch("var2",var2,"var2[var2f]/D");
This works fine.
Is it possible put var1n and var2n into the same branch (e.g. as an array)? I imagine something like this:
double var1[maxLength]; // first array to store
double var2[maxLength]; // second array to store
unsigned int n[2]; // lengths of the arrays for a given event
tree->Branch("n",n,"n[2]/i");
tree->Branch("var1",var1,"var1[n[0]]/D");
tree->Branch("var2",var2,"var2[n[1]]/D");
… but that doesn’t work.
So, the question is: Can something like this be done?
Motivation: I have many arrays (not just 2), and doing this would reduce the number of branches from 2N to N+1, making things much more tractable.
Thanks,
Peter