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Forum: Analysis
Re: Question Using OpenScientist to analyse Geant4 data (Mario O de Menezes)
Date: 30 Apr, 2002
From: Guy Barrand <Guy Barrand>

>    I've installed OpenScientist, with almost all packages

  Fine, at least it shows that the task is feasible by someone else
 than me...

> , and now I'm trying to use it to analyse Geant4 data.
>    I've compiled an simulation program, collected data within a root
>  file, following the example in examples/extended/analysis/... but
> I'm not sure what is the right or better approach to use those data.

  There is multiple ways to work. 

  You can use directly the ITuple, IEvaluator, IFunction, IPlotter, 
 etc... AIDA interfaces to do tuple cutting, fitting and 
 histo+function visualization within you simulation program.
  In this way you avoid the "analysis data file production".
 ("analysis data" being mainly tuples, histograms, functions)

  You can write another analysis program in C++ that will read the data
 file produced by the simulation program and use the interfaces
 to manipulate "analysis data" out of the simulation program.
 This way will cleanly disconnect the simulation + 
 "analysis data production" from the "data manipulation" phase ; 
 the cost being data file production (or some way to pass 
 data from one program to another).

  Another way, is to use the "scripting" to manipulate accumulated
 analysis data within a file. This avoid you to write a C++ program.

  The OpenScientist/Lab package comes with a Python (but also tcl, CINT) 
 binding of the AIDA interfaces. Then from there, you can write 
 Python (tcl, CINT) scripts to do tuple cutting, fitting and 
 histo+function visualization.

  There is some tutorial of using the Lab scripting accessible
 from the OpenScientist/tutorial page ; the URL for Lab/v6 
 being :
   http://www.lal.in2p3.fr/SI/Lab/v6/tutorial/tutorial.html   

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1 None: Re: Using OpenScientist to analyse Geant4 data   (Mario Olimpio de Menezes - 30 Apr, 2002)
(_ None: Re: Using OpenScientist to analyse Geant4 data   (Guy Barrand - 03 May, 2002)
1 Feedback: Re: Using OpenScientist to analyse Geant4 data   (Mario O de Menezes - 03 May, 2002)
2 None: social security search   (mark - 03 Oct, 2004)
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