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Forum: Analysis
Re: Question Ntuple fills per-event instead of per-hit (Matt Taggart)
Date: 09 Apr, 2013
From: Ivana Hrivnacova <Ivana Hrivnacova>

Hello Matt,

I am not sure if I understand correctly what you want to store in your ntuple. Supposing that you would just want ta save px,py,pz for all neutrons and gammas created during your event, you can fill ntuple values at your tracking action, in PreUserTrackingAction().

The analysis managers in 9.6 can handle only one ntuple; but in the Geant4 development version this limitation is removed and you can define more ntuples, and so you can implement different Fill frequency for each one. This may be suitable if you would want to fill different characteristics for neutrons and gammas.

Could you, please, give us more details about the quantities which you want to store?

Thank you,

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