{
"cells": [
{
"cell_type": "markdown",
"id": "47b4636c",
"metadata": {},
"source": [
"# hist034_TRatioPlot_fit_margin\n",
"The last label of the lower plot's y axis is hidden automatically.\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Paul Gessinger \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:12 PM."
]
},
{
"cell_type": "code",
"execution_count": 1,
"id": "e8d29f1f",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:12:47.695981Z",
"iopub.status.busy": "2026-05-19T20:12:47.695855Z",
"iopub.status.idle": "2026-05-19T20:12:48.279511Z",
"shell.execute_reply": "2026-05-19T20:12:48.279117Z"
}
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"****************************************\n",
"Minimizer is Minuit2 / Migrad\n",
"Chi2 = 29.7219\n",
"NDf = 34\n",
"Edm = 7.65715e-08\n",
"NCalls = 55\n",
"Constant = 395.847 +/- 6.87936 \n",
"Mean = 0.00695631 +/- 0.0142942 \n",
"Sigma = 1.00274 +/- 0.0101683 \t (limited)\n"
]
}
],
"source": [
"gStyle->SetOptStat(0);\n",
"auto c1 = new TCanvas(\"c1\", \"fit residual simple\");\n",
"gPad->SetFrameFillStyle(0);\n",
"auto h1 = new TH1D(\"h1\", \"h1\", 50, -5, 5);\n",
"h1->FillRandom(\"gaus\", 5000);\n",
"TFitResultPtr fitres = h1->Fit(\"gaus\", \"S0\");\n",
"h1->Sumw2();\n",
"h1->GetXaxis()->SetTitle(\"x\");\n",
"h1->GetYaxis()->SetTitle(\"y\");\n",
"auto rp1 = new TRatioPlot(h1, \"errfunc\");\n",
"rp1->SetGraphDrawOpt(\"L\");\n",
"rp1->SetSeparationMargin(0.0);\n",
"rp1->Draw();\n",
"rp1->GetLowerRefGraph()->SetMinimum(-2);\n",
"rp1->GetLowerRefGraph()->SetMaximum(2);"
]
},
{
"cell_type": "markdown",
"id": "a9318ebd",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "9e6d4ac9",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:12:48.302469Z",
"iopub.status.busy": "2026-05-19T20:12:48.302322Z",
"iopub.status.idle": "2026-05-19T20:12:48.613042Z",
"shell.execute_reply": "2026-05-19T20:12:48.612457Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
"\n",
"
\n",
"\n",
"\n",
"\n"
],
"text/plain": [
""
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"gROOT->GetListOfCanvases()->Draw()"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "ROOT C++",
"language": "c++",
"name": "root"
},
"language_info": {
"codemirror_mode": "text/x-c++src",
"file_extension": ".C",
"mimetype": " text/x-c++src",
"name": "c++"
}
},
"nbformat": 4,
"nbformat_minor": 5
}