def __init__(self):
'''
Set up PlotStyle, set gStyle for things we always want no matter what.
'''
# CMS-approved everything
tdrstyle.setTDRStyle()
### Differences from TDR standard:
# Big canvas (can always shrink later)
gStyle.SetCanvasDefH(1200)
gStyle.SetCanvasDefW(1200)
# Tick marks on all sides
gStyle.SetPadTickX(1)
gStyle.SetPadTickY(1)
# Everything has white backgrounds
gStyle.SetLegendFillColor(0)
# Colors that don't suck
gStyle.SetPalette(1)
# Make axis title and labels just a little smaller and (for Y) closer to the axis
gStyle.SetTitleSize(0.044, "XYZ")
gStyle.SetLabelSize(0.033, "XYZ")
gStyle.SetTitleYOffset(1.15)
gStyle.SetTitleXOffset(0.95)
gStyle.SetPadLeftMargin(0.1)
gStyle.SetPadRightMargin(0.025)
gStyle.SetPadBottomMargin(0.095)
gStyle.SetTitleAlign(12)
# Apply changes
gROOT.ForceStyle()
# Force exponentials when axes are over 3 digits
TGaxis.SetMaxDigits(3)
TGaxis.SetExponentOffset(-0.060, 0.008, "y")
TGaxis.SetExponentOffset(
-0.055, -0.062,
"x") # will overlap with title unless title is centered
def SetAxis(plot):
# Global settings from TGaxis
TGaxis.SetMaxDigits(4)
TGaxis.SetExponentOffset(-1000, -1000)
# X-axis settings
x = plot.GetXaxis()
x.SetLabelFont(FONT_TYPE)
x.SetTitleFont(FONT_TYPE)
x.SetLabelSize(AXIS_LABEL_FONT_SIZE)
x.SetTitleSize(AXIS_TITLE_FONT_SIZE)
# Y-axis settings
y = plot.GetYaxis()
y.SetLabelFont(FONT_TYPE)
y.SetTitleFont(FONT_TYPE)
y.SetLabelSize(AXIS_LABEL_FONT_SIZE)
y.SetTitleSize(AXIS_TITLE_FONT_SIZE)
y.SetTitleOffset(1.2)
if plot.GetMaximum() >= 10000:
y.SetTitle(y.GetTitle() + " x 10^{3}")
def setCMSLumiStyle(pad, iPosX, **kwargs):
global outOfFrame, lumiTextSize, lumiText
if iPosX / 10 == 0:
outOfFrame = True
lumiTextSize_ = lumiTextSize
relPosX_ = kwargs.get('relPosX', relPosX)
lumiText_ = kwargs.get('lumiText', lumiText)
if outOfFrame:
lumiTextSize_ *= 0.90
if 'era' in kwargs: # one era
era = kwargs.get('era')
setCMSEra(era, **kwargs)
elif 'eras' in kwargs: # list of multiple eras
eras = kwargs.get('eras')
setCMSEra(*eras, **kwargs)
#if lumiText=="":
# if iPeriod==1:
# lumiText += lumi_7TeV
# lumiText += " (7 TeV)"
# elif iPeriod==2:
# lumiText += lumi_8TeV
# lumiText += " (8 TeV)"
# elif iPeriod==3:
# lumiText = lumi_8TeV
# lumiText += " (8 TeV)"
# lumiText += " + "
# lumiText += lumi_7TeV
# lumiText += " (7 TeV)"
# elif iPeriod==4:
# lumiText += lumi_13TeV
# lumiText += " (13 TeV)"
# elif iPeriod==7:
# if outOfFrame: lumiTextSize_ *= 0.85
# lumiText += lumi_13TeV
# lumiText += " (13 TeV)"
# lumiText += " + "
# lumiText += lumi_8TeV
# lumiText += " (8 TeV)"
# lumiText += " + "
# lumiText += lumi_7TeV
# lumiText += " (7 TeV)"
# elif iPeriod==12:
# lumiText += "8 TeV"
# else:
# if outOfFrame: lumiTextSize_ *= 0.90
# if iPeriod==13:
# lumiText += lumi_13TeV
# lumiText += " (13 TeV)"
# elif iPeriod==2016:
# lumiText += lumi_2016
# lumiText += " (13 TeV)"
# elif iPeriod==2017:
# lumiText += lumi_2017
# lumiText += " (13 TeV)"
# elif iPeriod==2018:
# lumiText += lumi_2018
# lumiText += " (13 TeV)"
# elif iPeriod==14:
# lumiText += lumi_14TeV
# lumiText += " (14 TeV, 200 PU)"
##print lumiText
alignY_ = 3
alignX_ = 2
if iPosX == 0: alignY_ = 1
if iPosX / 10 == 0: alignX_ = 1
elif iPosX / 10 == 1: alignX_ = 1
elif iPosX / 10 == 2: alignX_ = 2
elif iPosX / 10 == 3: alignX_ = 3
align = 10 * alignX_ + alignY_
extraTextSize = extraOverCmsTextSize * cmsTextSize
H = pad.GetWh() * pad.GetHNDC()
W = pad.GetWw() * pad.GetWNDC()
l = pad.GetLeftMargin()
t = pad.GetTopMargin()
r = pad.GetRightMargin()
b = pad.GetBottomMargin()
e = 0.025
scale = float(H) / W if W > H else 1 # float(W)/H
pad.cd()
latex = TLatex()
latex.SetNDC()
latex.SetTextAngle(0)
latex.SetTextColor(kBlack)
latex.SetTextFont(42)
latex.SetTextAlign(31)
latex.SetTextSize(lumiTextSize_ * t)
if lumiText_:
latex.DrawLatex(1 - r, 1 - t + lumiTextOffset * t, lumiText_)
if iPosX == 0:
relPosX_ = relPosX_ * (50 * t * scale) * (cmsTextSize / 0.84)
posX = l + relPosX_ * (1 - l - r)
posY = 1 - t + lumiTextOffset * t
else:
posX = 0
posY = 1 - t - relPosY * (1 - t - b)
if iPosX % 10 <= 1:
posX = l + relPosX_ * (1 - l - r) # left aligned
elif iPosX % 10 == 2:
posX = l + 0.5 * (1 - l - r) # centered
elif iPosX % 10 == 3:
posX = 1 - r - relPosX_ * (1 - l - r) # right aligned
if outOfFrame:
TGaxis.SetExponentOffset(-0.12 * float(H) / W, 0.015, 'y')
latex.SetTextFont(cmsTextFont)
latex.SetTextAlign(11)
latex.SetTextSize(cmsTextSize * t)
latex.DrawLatex(l, 1 - t + lumiTextOffset * t, cmsText)
if writeExtraText:
latex.SetTextFont(extraTextFont)
latex.SetTextSize(extraTextSize * t)
latex.SetTextAlign(align)
latex.DrawLatex(posX, posY, extraText)
elif drawLogo:
posX = l + 0.045 * (1 - l - r) * W / H
posY = 1 - t - 0.045 * (1 - t - b)
xl_0 = posX
yl_0 = posY - 0.15
xl_1 = posX + 0.15 * H / W
yl_1 = posY
CMS_logo = TASImage("CMS-BW-label.png")
pad_logo = TPad("logo", "logo", xl_0, yl_0, xl_1, yl_1)
pad_logo.Draw()
pad_logo.cd()
CMS_logo.Draw('X')
pad_logo.Modified()
pad.cd()
else:
latex.SetTextFont(cmsTextFont)
latex.SetTextSize(cmsTextSize * t)
latex.SetTextAlign(align)
latex.DrawLatex(posX, posY, cmsText)
if writeExtraText:
latex.SetTextFont(extraTextFont)
latex.SetTextAlign(align)
latex.SetTextSize(extraTextSize * t)
latex.DrawLatex(posX, posY - relExtraDY * cmsTextSize * t,
extraText)
pad.Update()
def SAME2VsLumi(g1, g2,title, ptype, dataPeriod):
canvas = makeCMSCanvas(str(random.random()),"canvas",900,700)
canvas.cd()
graph1=copy.deepcopy(g1)
graph2=copy.deepcopy(g2)
graph1.SetMarkerColor(kBlue)#electrons
graph2.SetMarkerColor(kRed)#muons
multigraph = TMultiGraph()
multigraph.Add(graph1,"AP")
multigraph.Add(graph2,"AP")
multigraph.Draw("AP")
TGaxis.SetMaxDigits(2)
TGaxis.SetExponentOffset(-0.06, 0.02, "y")
multigraph.GetXaxis().SetTitle("L [fb^{-1}]")
multigraph.GetYaxis().SetTitleOffset(1.4)
if(ptype == "ISO"):
multigraph.GetYaxis().SetTitle("Isolation")
gPad.Modified()
multigraph.SetMinimum(0.5*gPad.GetUymin())
multigraph.SetMaximum(1.5*gPad.GetUymax())
elif(ptype == "SIP"):
multigraph.GetYaxis().SetTitle("SIP")
multigraph.SetMinimum(min(multigraph.GetHistogram().GetMinimum(),1.))
multigraph.SetMaximum(max(multigraph.GetHistogram().GetMinimum(),2.2))
min(multigraph.GetHistogram().GetMinimum(),1.)
printLumiPrelOut(canvas)
# Draw legend
legend = TLegend(0.93,0.84,0.99,0.93)
legend.AddEntry(graph1,"e^{+}e^{-}","P")
legend.AddEntry(graph2,"#mu^{+}#mu^{-}","P")
legend.SetFillColor(kWhite)
legend.SetLineColor(kBlack)
legend.SetTextFont(43)
legend.SetTextSize(20)
legend.Draw()
canvas.Update()
# Draw letters for data-taking periods
if(dataPeriod == "data2017"):
textLetters = TLatex()
textLetters.SetTextColor(kGray+1)
textLetters.SetTextSize(0.03)
if(ptype == "ISO"):
textLetters.DrawLatex(2., 0.8*gPad.GetUymax(),"B")
textLetters.DrawLatex(9.5, 0.8*gPad.GetUymax(),"C")
textLetters.DrawLatex(16., 0.8*gPad.GetUymax(),"D")
textLetters.DrawLatex(23., 0.8*gPad.GetUymax(),"E")
textLetters.DrawLatex(36., 0.8*gPad.GetUymax(),"F")
elif(ptype == "SIP"):
textLetters.DrawLatex(2., 1.5,"B")
textLetters.DrawLatex(9.5, 1.5,"C")
textLetters.DrawLatex(16., 1.5,"D")
textLetters.DrawLatex(23., 1.5,"E")
textLetters.DrawLatex(36., 1.5,"F")
if(dataPeriod == "data2018"):
textLetters = TLatex()
textLetters.SetTextColor(kGray+1)
textLetters.SetTextSize(0.03)
if(ptype == "ISO"):
textLetters.DrawLatex(6., 0.8*gPad.GetUymax(), "A")
textLetters.DrawLatex(16., 0.8*gPad.GetUymax(), "B")
textLetters.DrawLatex(23., 0.8*gPad.GetUymax(), "C")
textLetters.DrawLatex(43., 0.8*gPad.GetUymax(), "D")
elif(ptype == "SIP"):
textLetters.DrawLatex(6., 1.5, "A")
textLetters.DrawLatex(16., 1.5, "B")
textLetters.DrawLatex(23., 1.5, "C")
textLetters.DrawLatex(43., 1.5, "D")
# ****
if(dataPeriod == "data2018"):
# draw vertical lines that divide different data taking periods
down = gPad.GetUymin()
up = gPad.GetUymax()
lineA = TLine(13.48, down, 13.48, up) # Run2018A up to 13.48 fb-1
lineA.SetLineColor(kBlack)
lineA.SetLineStyle(2)
lineA.Draw()
lineB = TLine(20.265, down, 20.265, up) # Run2018B up to 20.265 fb-1
lineB.SetLineColor(kBlack)
lineB.SetLineStyle(2)
lineB.Draw()
lineC = TLine(26.877, down, 26.877, up) # Run2018C up to 26.877 fb-1
lineC.SetLineColor(kBlack)
lineC.SetLineStyle(2)
lineC.Draw()
# ****
if(dataPeriod == "data2017"):
# draw vertical lines that divide different data taking periods
down = gPad.GetUymin()
up = gPad.GetUymax()
lineB = TLine(4.793, down, 4.793, up) # Run2017B up to 4.793 fb-1
lineB.SetLineColor(kBlack)
lineB.SetLineStyle(2)
lineB.Draw()
lineC = TLine(14.549, down, 14.549, up) # Run2017C up to 14.549 fb-1
lineC.SetLineColor(kBlack)
lineC.SetLineStyle(2)
lineC.Draw()
lineD = TLine(18.868, down, 18.868, up) # Run2017D up to 18.868 fb-1
lineD.SetLineColor(kBlack)
lineD.SetLineStyle(2)
lineD.Draw()
lineE = TLine(28.293, down, 28.293, up) # Run2017E up to 28.293 fb-1
lineE.SetLineColor(kBlack)
lineE.SetLineStyle(2)
lineE.Draw()
# ****
if(dataPeriod == "data2016"):
# draw vertical lines that divide different data taking periods
down = gPad.GetUymin()
up = gPad.GetUymax()
lineB = TLine(5.789, down, 5.789, up) # Run2016B up to 5.789 fb-1
lineB.SetLineColor(kBlack)
lineB.SetLineStyle(2)
lineB.Draw()
lineC = TLine(8.366, down, 8.366, up) # Run2016C up to 8.366 fb-1
lineC.SetLineColor(kBlack)
lineC.SetLineStyle(2)
lineC.Draw()
lineD = TLine(12.616, down, 12.616, up) # Run2016D up to 12.616 fb-1
lineD.SetLineColor(kBlack)
lineD.SetLineStyle(2)
lineD.Draw()
lineE = TLine(16.624, down, 16.624, up) # Run2016E up to 16.624 fb-1
lineE.SetLineColor(kBlack)
lineE.SetLineStyle(2)
lineE.Draw()
lineF = TLine(19.725, down, 19.725, up) # Run2016F up to 19.725 fb-1
lineF.SetLineColor(kBlack)
lineF.SetLineStyle(2)
lineF.Draw()
lineG = TLine(27.268, down, 27.268, up) # Run2016G up to 27.268 fb-1
lineG.SetLineColor(kBlack)
lineG.SetLineStyle(2)
lineG.Draw()
# ****
canvas.SaveAs(title + ".root")
canvas.SaveAs(title + ".pdf")
canvas.SaveAs(title + ".png")
return;
def SAME3VsLumi(g1, g2, g3, title, ptype, lineMC1, lineDATA1, lineMC2, lineDATA2, lineMC3, lineDATA3, DoInclusive, dataPeriod):
canvas = makeCMSCanvas(str(random.random()),"canvas",900,700)
canvas.cd()
graph2=copy.deepcopy(g2)
graph3=copy.deepcopy(g3)
graph2.SetMarkerColor(kBlue)#electrons
graph3.SetMarkerColor(kRed)#muons
multigraph = TMultiGraph()
if(DoInclusive):
graph1=copy.deepcopy(g1)
multigraph.Add(graph1,"AP")
multigraph.Add(graph2,"AP")
multigraph.Add(graph3,"AP")
multigraph.Draw("AP")
TGaxis.SetMaxDigits(2)
TGaxis.SetExponentOffset(-0.05, 0.02, "y")
multigraph.GetXaxis().SetTitle("L [fb^{-1}]")
multigraph.GetYaxis().SetTitleOffset(1.4)
if(ptype == "Zmass"):
multigraph.GetYaxis().SetTitle("M_{Z} [GeV]")
# multigraph.GetYaxis().SetTitle("M_{l^{+}l^{-}} [GeV]")
multigraph.SetMaximum(max(multigraph.GetHistogram().GetMaximum(),91.4))
multigraph.SetMinimum(min(multigraph.GetHistogram().GetMinimum(),89.6))
elif(ptype == "Zwidth"):
multigraph.GetYaxis().SetTitle("#Gamma_{Z} [GeV]")
elif(ptype == "Zmult"):
multigraph.GetYaxis().SetTitle("#Z / fb^{-1}")
if(not DoInclusive) :
multigraph.SetMaximum(max(multigraph.GetHistogram().GetMaximum(),60000.)) # set y axis minimum at 60000.
multigraph.SetMinimum(0.) # set y axis minimum at 0.
# multigraph.SetMaximum(60000.) #second type: vs 2016 plots
# multigraph.SetMinimum(25000.)
printLumiPrelOut(canvas)
# Draw legend
legend = TLegend(0.93,0.84,0.99,0.93)
if(DoInclusive):
#legend.AddEntry(graph1,"inclusive","P")
legend.AddEntry(graph1,"BB","P")
legend.AddEntry(graph2,"BE","P")
legend.AddEntry(graph3,"EE","P")
else :
legend.AddEntry(graph2,"e^{+}e^{-}","P")
legend.AddEntry(graph3,"#mu^{+}#mu^{-}","P")
legend.SetFillColor(kWhite)
legend.SetLineColor(kBlack)
legend.SetTextFont(43)
legend.SetTextSize(20)
legend.Draw()
canvas.Update()
# Draw letters for data-taking periods
if(dataPeriod == "data2017"):
textLetters = TLatex()
textLetters.SetTextColor(kGray+1)
textLetters.SetTextSize(0.03)
if(ptype == "Zmass"):
textLetters.DrawLatex(2., gPad.GetUymin()+0.2,"B")
textLetters.DrawLatex(9.5, gPad.GetUymin()+0.2,"C")
textLetters.DrawLatex(16., gPad.GetUymin()+0.2,"D")
textLetters.DrawLatex(23., gPad.GetUymin()+0.2,"E")
textLetters.DrawLatex(36., gPad.GetUymin()+0.2,"F")
elif(ptype == "Zwidth"):
textLetters.DrawLatex(2., gPad.GetUymin()+0.3,"B")
textLetters.DrawLatex(9.5, gPad.GetUymin()+0.3,"C")
textLetters.DrawLatex(16., gPad.GetUymin()+0.3,"D")
textLetters.DrawLatex(23., gPad.GetUymin()+0.3,"E")
textLetters.DrawLatex(36., gPad.GetUymin()+0.3,"F")
elif(ptype == "Zmult") :
textLetters.DrawLatex(2., 260000,"B")
textLetters.DrawLatex(9.5, 260000,"C")
textLetters.DrawLatex(16., 260000,"D")
textLetters.DrawLatex(23., 260000,"E")
textLetters.DrawLatex(36., 260000,"F")
if(dataPeriod == "data2018"):
textLetters = TLatex()
textLetters.SetTextColor(kGray+1)
textLetters.SetTextSize(0.03)
if(ptype == "Zmass"):
textLetters.DrawLatex(6., gPad.GetUymin() + 0.6,"A")
textLetters.DrawLatex(16., gPad.GetUymin() + 0.6,"B")
textLetters.DrawLatex(23., gPad.GetUymin() + 0.6,"C")
textLetters.DrawLatex(43., gPad.GetUymin() + 0.6,"D")
elif(ptype == "Zwidth"):
textLetters.DrawLatex(6., gPad.GetUymin() +0.3,"A")
textLetters.DrawLatex(16., gPad.GetUymin() +0.3,"B")
textLetters.DrawLatex(23., gPad.GetUymin() +0.3,"C")
textLetters.DrawLatex(43., gPad.GetUymin() +0.3,"D")
elif(ptype == "Zmult") :
textLetters.DrawLatex(6., 260000,"A")
textLetters.DrawLatex(16., 260000,"B")
textLetters.DrawLatex(23., 260000,"C")
textLetters.DrawLatex(43., 260000,"D")
# ****
if(dataPeriod == "data2018"):
# draw vertical lines that divide different data taking periods
down = gPad.GetUymin()
up = gPad.GetUymax()
lineA = TLine(13.48, down, 13.48, up) # Run2018A up to 13.48 fb-1
lineA.SetLineColor(kBlack)
lineA.SetLineStyle(2)
lineA.Draw()
lineB = TLine(20.265, down, 20.265, up) # Run2018B up to 20.265 fb-1
lineB.SetLineColor(kBlack)
lineB.SetLineStyle(2)
lineB.Draw()
lineC = TLine(26.877, down, 26.877, up) # Run2018C up to 26.877 fb-1
lineC.SetLineColor(kBlack)
lineC.SetLineStyle(2)
lineC.Draw()
if(dataPeriod == "data2017"):
# draw vertical lines that divide different data taking periods
down = gPad.GetUymin()
up = gPad.GetUymax()
lineB = TLine(4.793, down, 4.793, up) # Run2017B up to 4.793 fb-1
lineB.SetLineColor(kBlack)
lineB.SetLineStyle(2)
lineB.Draw()
lineC = TLine(14.549, down, 14.549, up) # Run2017C up to 14.549 fb-1
lineC.SetLineColor(kBlack)
lineC.SetLineStyle(2)
lineC.Draw()
lineD = TLine(18.868, down, 18.868, up) # Run2017D up to 18.868 fb-1
lineD.SetLineColor(kBlack)
lineD.SetLineStyle(2)
lineD.Draw()
lineE = TLine(28.293, down, 28.293, up) # Run2017E up to 28.293 fb-1
lineE.SetLineColor(kBlack)
lineE.SetLineStyle(2)
lineE.Draw()
if(dataPeriod == "data2016"):
# draw vertical lines that divide different data taking periods
down = gPad.GetUymin()
up = gPad.GetUymax()
lineB = TLine(5.789, down, 5.789, up) # Run2016B up to 5.789 fb-1
lineB.SetLineColor(kBlack)
lineB.SetLineStyle(2)
lineB.Draw()
lineC = TLine(8.366, down, 8.366, up) # Run2016C up to 8.366 fb-1
lineC.SetLineColor(kBlack)
lineC.SetLineStyle(2)
lineC.Draw()
lineD = TLine(12.616, down, 12.616, up) # Run2016D up to 12.616 fb-1
lineD.SetLineColor(kBlack)
lineD.SetLineStyle(2)
lineD.Draw()
lineE = TLine(16.624, down, 16.624, up) # Run2016E up to 16.624 fb-1
lineE.SetLineColor(kBlack)
lineE.SetLineStyle(2)
lineE.Draw()
lineF = TLine(19.725, down, 19.725, up) # Run2016F up to 19.725 fb-1
lineF.SetLineColor(kBlack)
lineF.SetLineStyle(2)
lineF.Draw()
lineG = TLine(27.268, down, 27.268, up) # Run2016G up to 27.268 fb-1
lineG.SetLineColor(kBlack)
lineG.SetLineStyle(2)
lineG.Draw()
# ****
# draw orizontal lines for MC and DATA fit
if(ptype == "Zmass" or ptype == "Zwidth") :
leftEnd = gPad.GetUxmin()
rightEnd = gPad.GetUxmax()
if(DoInclusive):
line1 = TLine(leftEnd,lineMC1,rightEnd,lineMC1)
line1.SetLineColor(kBlack)
line1.SetLineStyle(1)
line1.Draw()
line2 = TLine(leftEnd,lineDATA1,rightEnd,lineDATA1)
line2.SetLineColor(kBlack)
line2.SetLineStyle(2)
line2.Draw()
# line for graph 2: color blue
line3 = TLine(leftEnd,lineMC2,rightEnd,lineMC2)
line3.SetLineColor(kBlue)
line3.SetLineStyle(1)
line3.Draw()
line4 = TLine(leftEnd,lineDATA2,rightEnd,lineDATA2)
line4.SetLineColor(kBlue)
line4.SetLineStyle(2)
line4.Draw()
# line for graph 3: color red
line5 = TLine(leftEnd,lineMC3,rightEnd,lineMC3)
line5.SetLineColor(kRed)
line5.SetLineStyle(1)
line5.Draw()
line6 = TLine(leftEnd,lineDATA3,rightEnd,lineDATA3)
line6.SetLineColor(kRed)
line6.SetLineStyle(2)
line6.Draw()
# ***
canvas.SaveAs(title + ".root")
canvas.SaveAs(title + ".pdf")
canvas.SaveAs(title + ".png")
return;
from math import sqrt, pi
import PlotTools.CMS_lumi as CMS_lumi
import PlotTools.tdrstyle as tdrstyle
import ROOT
from ROOT import gROOT, gSystem, gPad, gStyle, gRandom, gDirectory, gSystem, TGaxis,\
TFile, TTree, TH1F, TH1D, TH2F, THStack, TCanvas, TLegend,\
TText, TLatex, TLorentzVector,\
kBlue, kAzure, kRed, kGreen, kYellow, kOrange, kMagenta
from argparse import ArgumentParser
#import os; os.getenv('DYLD_LIBRARY_PATH')
gSystem.Load(
"/shome/ineuteli/production/MG5_aMC_v2_5_4/ExRootAnalysis/libExRootAnalysis.so"
)
ROOT.gROOT.SetBatch(ROOT.kTRUE)
gStyle.SetOptStat(0)
TGaxis.SetExponentOffset(-0.060, 0.005, 'y')
argv = sys.argv
usage = '''This script makes plots for root files from LHE files.'''
parser = ArgumentParser(prog="checkLHE", description=usage, epilog="Succes!")
parser.add_argument("-N",
"--max-events",
dest="Nmax",
type=int,
default=-1,
action='store',
metavar="N_EVENTS_MAX",
help="maximum number of events per root file.")
args = parser.parse_args()
Nmax = int(args.Nmax) # maximum number of events
