# Ratioplot 4¶

Example that shows custom dashed lines on the lower plot, specified by a vector of floats.

By default, dashed lines are drawn at certain points. You can either disable them, or specify where you want them to appear. Inspired by the tutorial of Paul Gessinger.

Author: Alberto Ferro
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Thursday, May 19, 2022 at 08:15 AM.

In [1]:
import ROOT

ROOT.gStyle.SetOptStat(0)

c1 = ROOT.TCanvas("c1", "fit residual simple")
h1 = ROOT.TH1D("h1", "h1", 50, -5, 5)
h1.FillRandom("gaus", 2000)
h1.Fit("gaus")
h1.GetXaxis().SetTitle("x")
h1.GetYaxis().SetTitle("y")

rp1 = ROOT.TRatioPlot(h1)

lines = ROOT.std.vector('double')()
for i in range(-3,4):lines.push_back(i)
rp1.SetGridlines(lines)

rp1.Draw()
rp1.GetLowerRefGraph().SetMinimum(-4)
rp1.GetLowerRefGraph().SetMaximum(4)

c1.Update()

Welcome to JupyROOT 6.27/01


Draw all canvases

In [2]:
from ROOT import gROOT
gROOT.GetListOfCanvases().Draw()