hist033_TRatioPlot_fit_confidence.py

## \ingroup tutorial_hist

## \notebook

## Example that shows how you can set the colors of the confidence interval bands by using

## the method `TRatioPlot::SetConfidenceIntervalColors`.

## Inspired by the tutorial of Paul Gessinger.

##

## \macro_image

## \macro_code

##

## \author Alberto Ferro

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)

rp1.SetConfidenceIntervalColors("kBlue", "kRed")

rp1.Draw()

c1.Update()