{
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"source": [
"# df021_createTGraph\n",
"Fill a TGraph using RDataFrame.\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Enrico Guiraud, Danilo Piparo (CERN), Massimo Tumolo (Politecnico di Torino) \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:09 PM."
]
},
{
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"outputs": [],
"source": [
"ROOT::EnableImplicitMT(2);\n",
"\n",
"ROOT::RDataFrame d(160);"
]
},
{
"cell_type": "markdown",
"id": "7537d982",
"metadata": {},
"source": [
"Create a trivial parabola"
]
},
{
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"execution_count": 2,
"id": "0f71244c",
"metadata": {
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"execution": {
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"shell.execute_reply": "2026-05-19T20:09:56.063882Z"
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},
"outputs": [],
"source": [
"auto dd = d.Alias(\"x\", \"rdfentry_\").Define(\"y\", \"x*x\");\n",
"\n",
"auto graph = dd.Graph(\"x\", \"y\");"
]
},
{
"cell_type": "markdown",
"id": "dea3ff0f",
"metadata": {},
"source": [
"This tutorial is ran with multithreading enabled. The order in which points are inserted is not known, so to have a meaningful representation points are sorted."
]
},
{
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"shell.execute_reply": "2026-05-19T20:09:57.153772Z"
}
},
"outputs": [],
"source": [
"graph->Sort();\n",
"auto c = new TCanvas();\n",
"graph->DrawClone(\"APL\");"
]
},
{
"cell_type": "markdown",
"id": "3fffcc29",
"metadata": {},
"source": [
"Draw all canvases "
]
},
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"execution_count": 4,
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],
"source": [
"gROOT->GetListOfCanvases()->Draw()"
]
}
],
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