Ntuple-ology at hestia

• The following is a html version of S.Kettell's "ntuple-ology" message on Mon,24 Jun 2002, with modifications for conditions at hestia.
• Also take a look at the Web page "Introduction to Ntuple Analysis for Beginners" to learn how to do the anlaysis.

startup of your account at hestia

• copy .login .cshrc and .alias files from ~e949/ to your own accont.
  (You need to do "%setup e949" "%setup kofia" and "%setup cernlib" to setup the E949 environment; the .login file does all of this .)

ntuples

• The "autorun" ntuples, which were created shortly after the data was taken by the current best Pass2 job, from the monitors-to-disk data, are stored in /scr10/e949/autorun/pass2_xxx/ntuple/analyzed/ . Exactly speaking,
  
  • /scr10/e949/autorun/pass2_1gamma/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_kbeam/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_km21/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_km22/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_kp21/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_kp22/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_piscat/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_pnn1or2/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_pnnl0/ntuple/analyzed/
  • /scr10/e949/autorun/pass2_rsmon/ntuple/analyzed/
• All the scaler record ntuples (*.eos) are moved to /scr10/e949/autorun/pass2_xxx/ntuple/eos/ .

source code

• The pass2 analysis code that created the autorun ntuples are copied to /scr02/e949/pass2.020715/ (which is linked from ~e949/pass2/).
  "%setup pass2 02" automaticall makes the access to the code available.
• "%cd $PASS2_SOURCE" to go to the directory of the source code.

useful programs and scripts

• Since the size of the E949/E787 pass2 ntuples are huge, the PAW-command uwfunc does not work with them.
  The special program "uwfunc" was therefore prepared. The execution file is available at /scr02/local/bin/uwfunc.
• For chaining many ntuple files, the kumac script "chain_nt.kumac" by S.Chen and D.Jaffe are very useful.
  %ln -s /scr10/e949/autorun/pass2_1gamma/ntuple/analyzed/ 1g
  PAW> exec chain_nt ./1g 0 1gamma
  PAW> nt/loop 1 analysis.f(0.)
  A debugged kumac script is currently available at ~koma/work/e949/nt_ana/chain_nt_dj.kumac.

documents and newsgroups

• pass2 ntuple variable descriptions by JoeM, 2001Dec, part 1 and part 2
  See also 0) Variable names and their meanings in the pass2 ntuple in Introduction to Ntuple Analysis for Beginners.
• "Analysis System" at ~e949/pass2/01/anal/ by JoeM, 2002Dec, Instructions (and errata)
• The analysis-related information will be distributed through e949.pass1 (location for active discussion on analysis work) and e949.kofia (for updates on Kofia code).
  Also check ELOG system=calibrations for status of detector calibrations.