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Ostap installation guide for CERN SWAN service

To install the Ostap package on the CERN SWAN service, you must perform the following steps:

  1. Run a local session in CERN SWAN

Image Start

  1. Go to the terminal and clone the latest released version and build Ostap package

git clone ...

Full information on installing the Ostap package can be found https://github.com/OstapHEP/ostap

Image Terminal

  1. Create in local session a shell file in which environment variables for Ostap will be set. The following environment variables must be defined in this file:
export OSTAPVERSION=1.4.3.1
export OSTAPDIR=$CERNBOX_HOME/ostap/build
export PATH=$OSTAPDIR/bin:$PATH
export PYTHONPATH=$OSTAPDIR/lib/python2.7/site-packages:$PYTHONPATH
export LD_LIBRARY_PATH=$OSTAPDIR/lib:$LD_LIBRARY_PATH
export MANPATH=$MANPATH:$OSTAPDIR/doc/man

  1. Exit to the start menu of the local session using the button "Change configuration" and in the field “Environment script” add the path to the file created in step 3.

    For example: $CERNBOX_HOME/SWAN_projects/ostapenv.sh

Image Config

  1. To use the Ostap package, you need to create a new file and select the Python 2 language.

Image Notebook

  1. To verify the correct installation of the Ostap package on the CERN SWAN, you can use the following code: 
    import ROOT
import ostap.fitting.models as Models
RRV = ROOT.RooRealVar
c1 = ROOT.TCanvas()
gauss = Models.Gauss_pdf( 'Gauss' , 
                     xvar  = ( 2.5 , 3.5 ) ,
                     mean  = ( 3.100 , 2.50 , 3.50 ) ,
                     sigma = ( 0.015 , 0.010 , 0.025 ) )
qq = gauss.draw()
qq.draw()
c1.Draw()

The result of the correct operation of the program will be the following image

Image example