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Merge Root trees [message #14591]

Mon, 08 April 2013 15:17

Frank Nerling
Messages: 24
Registered: March 2013

continuous participant

From: *gsi.de

Hi everybody,

has somebody experience and/or know how best to merge Panda RootTrees from multiple files from batch farm?

Thanks, Ralf & Frank

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Re: Merge Root trees [message #14593 is a reply to message #14591]

Mon, 08 April 2013 15:32

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *vpn.unito.it

The best way is not to merge pandaroot trees but to run single analysis on each subjob, and finally to merge the final ntuple/histogram files with the root "hard" command.

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