If you look at my first post, I have a code that does exactly this.
I have already have a code that makes the ntuple.
My question is different to that, though.
In my Ntuple code, I am using the same variables that I have defined in my linux script to process the data.
So it would be rather convenient to define the variables only once, preferably in the linux script.
The root code I am providing is just a test code to check whether the variables are parsed/imported into root. Check this thread to see my macro code.
[url]Create(and fill) histograms and ntuple using a for loop