Re: [ROOT] concatenating root files

• Next message: Rene Brun: "Re: [ROOT] Multiple access to a file"
• Previous message: Harufumi Tsuchiya: "[ROOT] I can not zoom in/out when I use THStack class."
• In reply to: Yuri Gotra: "[ROOT] concatenating root files"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hi Yuri,

For adding histograms from multiple files, see script
 $ROOTSYS/tutorials/hadd.C

For Trees, two options
  - Use a TChain without merging the files in one single file
  - Use a TChain and use TChain::Merge to create a new file.

Rene Brun

Yuri Gotra wrote:
> 
> Hi All,
> 
>       I'm looking for a recipe to concatenate several root files together.
> Files contain the same histograms and ntuples and were created by processing
> different input dataset files. I'd like to loop my analysis code over a single
> file. Making a single file during the processing of several input dataset
> files was not an option.
> 
> Thank you,
>            Yuri

• Next message: Rene Brun: "Re: [ROOT] Multiple access to a file"
• Previous message: Harufumi Tsuchiya: "[ROOT] I can not zoom in/out when I use THStack class."
• In reply to: Yuri Gotra: "[ROOT] concatenating root files"
• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:51 MET