#This is the README for CMS winter school hand-on, the command you should run will indicate with " > "

1.creat CMSSW，copy the codes and files to your directory 

> source /cvmfs/cms.cern.ch/cmsset_default.sh
> scram p -n winter_school_CMSSW_8_1_0 CMSSW CMSSW_8_1_0
> cd winter_school_CMSSW_8_1_0/src
> cmsenv
> cp -r /publicfs/cms/user/yutz/CMS_winter_school  ./
> cd CMS_winter_school

2.run the Event selection script to produce the Ntuple files

> root -b -q EventSelection_dineutrino_Resolved_2018.cpp

Run this script will produce four root files: ST_t-channel_antitop.root  ST_t-channel_top.root  ST_tW_antitop.root  ST_tW_top.root in your directory

3.produce the MC distribution plots

> root -b -q plotterPreselection_dineutrino_2018.cpp  

open the files like this: 

> display TopMass.pdf
> display TopPt.pdf
> display TopEta.pdf

Then you can see the top mass,pt,eta distribution