{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Graph\n",
    "A Simple Graph Example\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "**Author:** Wim Lavrijsen  \n",
    "<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 Sunday, January 23, 2022 at 09:31 AM.</small></i>"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "from __future__ import print_function\n",
    "from ROOT import TCanvas, TGraph\n",
    "from ROOT import gROOT\n",
    "from math import sin\n",
    "from array import array\n",
    "\n",
    "\n",
    "c1 = TCanvas( 'c1', 'A Simple Graph Example', 200, 10, 700, 500 )\n",
    "\n",
    "c1.SetFillColor( 42 )\n",
    "c1.SetGrid()\n",
    "\n",
    "n = 20\n",
    "x, y = array( 'd' ), array( 'd' )\n",
    "\n",
    "for i in range( n ):\n",
    "   x.append( 0.1*i )\n",
    "   y.append( 10*sin( x[i]+0.2 ) )\n",
    "   print(' i %i %f %f ' % (i,x[i],y[i]))\n",
    "\n",
    "gr = TGraph( n, x, y )\n",
    "gr.SetLineColor( 2 )\n",
    "gr.SetLineWidth( 4 )\n",
    "gr.SetMarkerColor( 4 )\n",
    "gr.SetMarkerStyle( 21 )\n",
    "gr.SetTitle( 'a simple graph' )\n",
    "gr.GetXaxis().SetTitle( 'X title' )\n",
    "gr.GetYaxis().SetTitle( 'Y title' )\n",
    "gr.Draw( 'ACP' )"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "TCanvas.Update() draws the frame, after which one can change it"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "c1.Update()\n",
    "c1.GetFrame().SetFillColor( 21 )\n",
    "c1.GetFrame().SetBorderSize( 12 )\n",
    "c1.Modified()\n",
    "c1.Update()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "If the graph does not appear, try using the \"i\" flag, e.g. \"python3 -i graph.py\"\n",
    "This will access the interactive mode after executing the script, and thereby persist\n",
    "long enough for the graph to appear."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Draw all canvases "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "from ROOT import gROOT \n",
    "gROOT.GetListOfCanvases().Draw()"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 2",
   "language": "python",
   "name": "python2"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 2
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython2",
   "version": "2.7.10"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}