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#!/usr/bin/env python
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import os, commands, sys
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from array import array
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import ROOT
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if __name__ == "__main__":
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if len(sys.argv[1:]) != 1:
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print "\nUsage "+sys.argv[0]+" <file>"
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print "where <file> is a text file with 2 columns:"
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print "RUN_NUMBER PRESSURE[mbar] PRESSURE_err[mbar]\n"
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exit()
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###Read data from txt file
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#file = open('pressure_twiki_160406-172268.dat')
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file = open(sys.argv[1])
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counter = 0
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runs = []
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pressure = []
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pressureErr = []
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dummyErr = []
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for line in file:
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print line.split()
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dummyErr.append(0.0)
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runs.append(float(line.split()[0]))
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if(len(line.split())>1):
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pressure.append(float(line.split()[1]))
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if(len(line.split())>2):
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pressureErr.append(float(line.split()[2]))
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else:
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pressureErr.append(0.0)
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else:
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pressure.append(0.0)
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pressureErr.append(0.0)
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counter+=1
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x = array("d",runs)
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y = array("d",pressure)
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ex = array("d",dummyErr)
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ey = array("d",pressureErr)
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###Define efficiency map histogram
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myFile = ROOT.TFile("PressureGraph.root","RECREATE")
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myGraph = ROOT.TGraphErrors(len(runs),x,y,ex,ey)
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myGraph.SetName("Graph")
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myGraph.Write()
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myFile.Write()
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myFile.Close()
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