{
"cells": [
{
"cell_type": "markdown",
"id": "8dd95c7c",
"metadata": {},
"source": [
"# gr004_errors_asym\n",
"The errors for the x values are divided into low (left side of the marker) and high (right side of the marker) errors.\n",
"Similarly, for the y values, there are low (lower side of the marker) and high (upper side of the marker) errors.\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Miro Helbich, Jamie Gooding \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:37 PM."
]
},
{
"cell_type": "code",
"execution_count": 1,
"id": "92e25c47",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:45.909011Z",
"iopub.status.busy": "2026-05-19T20:37:45.908869Z",
"iopub.status.idle": "2026-05-19T20:37:47.105882Z",
"shell.execute_reply": "2026-05-19T20:37:47.105461Z"
}
},
"outputs": [],
"source": [
"import numpy as np\n",
"import ROOT\n",
"\n",
"c2 = ROOT.TCanvas(\"c2\", \"\", 700, 500)\n",
"\n",
"c2.SetGrid()\n",
"npoints = 3\n",
"xaxis = np.array([1.0, 2.0, 3.0])\n",
"yaxis = np.array([10.0, 20.0, 30.0])\n",
"\n",
"exl = np.array([0.5, 0.2, 0.1]) # Lower x errors\n",
"exh = np.array([0.5, 0.3, 0.4]) # Higher x errors\n",
"eyl = np.array([3.0, 5.0, 4.0]) # Lower y errors\n",
"eyh = np.array([3.0, 5.0, 4.0]) # Higher y errors\n",
"\n",
"gr = ROOT.TGraphAsymmErrors(\n",
" npoints, xaxis, yaxis, exl, exh, eyl, eyh\n",
") # Create the TGraphAsymmErrors object with data and asymmetrical errors\n",
"\n",
"gr.SetTitle(\"A simple graph with asymmetrical errors\")\n",
"gr.Draw(\"A*\") # \"A\" = draw axes and \"*\" = draw markers at the points with error bars"
]
},
{
"cell_type": "markdown",
"id": "f70ebaf6",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "6e9c7983",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:47.116496Z",
"iopub.status.busy": "2026-05-19T20:37:47.116282Z",
"iopub.status.idle": "2026-05-19T20:37:47.325216Z",
"shell.execute_reply": "2026-05-19T20:37:47.324873Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
"\n",
"
\n",
"\n",
"\n",
"\n"
],
"text/plain": [
""
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"from ROOT import gROOT \n",
"gROOT.GetListOfCanvases().Draw()"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
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