#!/usr/bin/env python
# coding: utf-8

# # ratioplot6
# Example showing a fit residual plot, where the separation margin has been set to 0.
# The last label of the lower plot's y axis is hidden automatically.
# Inspired by the tutorial of Paul Gessinger.
# 
# 
# 
# 
# **Author:** Alberto Ferro  
# <i><small>This notebook tutorial was automatically generated with <a href= "https://github.com/root-project/root/blob/master/documentation/doxygen/converttonotebook.py">ROOTBOOK-izer</a> from the macro found in the ROOT repository  on Wednesday, April 17, 2024 at 11:13 AM.</small></i>

# In[1]:


import ROOT

ROOT.gStyle.SetOptStat(0)

c1 = ROOT.TCanvas("c1", "fit residual simple")
ROOT.gPad.SetFrameFillStyle(0)

h1 = ROOT.TH1D("h1", "h1", 50, -5, 5)
h1.FillRandom("gaus", 5000)
h1.Fit("gaus", "S")

h1.Sumw2()
h1.GetXaxis().SetTitle("x")
h1.GetYaxis().SetTitle("y")

rp1 = ROOT.TRatioPlot(h1, "errfunc")
rp1.SetGraphDrawOpt("L")
rp1.SetSeparationMargin(0.0)
rp1.Draw()
rp1.GetLowerRefGraph().SetMinimum(-2)
rp1.GetLowerRefGraph().SetMaximum(2)

c1.Update()


# Draw all canvases 

# In[2]:


from ROOT import gROOT 
gROOT.GetListOfCanvases().Draw()