From plotting to Ntuples

Newbie
1

Hi,

I have a plotting script which make and fills TH1’s, and I want to change the TH1’s to Ntuples, so I can analyse the data easily, Is there a straight forward way to link the TH1’s to a TTree?

Or are there any more efficient ways to tackle this problem?

Thanks!

2

There is no direct “conversion” from a histograms oriented data store to a ntuple one. You need to define the variables you are looking for, create the corresponding ntuple, fill it and then you will be able to create histograms from it.

3

Hi Couet,

I’m not looking to convert a TH1’s to ntuples, I want to change the script to store ntuples instead of TH1’s, and I was wondering how you do that?

Thanks!

4

Yes that’s what I explained:

You need to define the variables you are looking for, create the corresponding ntuple, fill it and then you will be able to create histograms from it.

5

look at:

https://root.cern/doc/master/classTNtuple.html#af45dbed82038acc4acb1629cca37e7ab

and

$ROOTSYS/tutorials/hsimple.C

Otto