See lhcb@ckm:~/noise/howToMakeNoisePlots.txt
Use the script
~/noise/scripts/makeNoisePlots.py
Use the script
~/noise/scripts/PlotNoiseVsTime.py
Run the script histos.sh on lxplus. Script and more info see:
lhcb@ckm:~/noise/howToGenerateTheRootFiles.txt