{
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{
"cell_type": "markdown",
"id": "b3162237",
"metadata": {},
"source": [
"# first\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Rene Brun \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": "f5baed44",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:03.671342Z",
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"source": [
"TCanvas *nut = new TCanvas(\"nut\", \"FirstSession\", 100, 10, 700, 900);\n",
"nut->Range(0, 0, 20, 24);\n",
"nut->SetFillColor(10);\n",
"nut->SetBorderSize(2);\n",
"\n",
"TPaveLabel *pl = new TPaveLabel(3, 22, 17, 23.7, \"My first ROOT interactive session\", \"br\");\n",
"pl->SetFillColor(18);\n",
"pl->Draw();\n",
"\n",
"TText t(0, 0, \"a\");\n",
"t.SetTextFont(62);\n",
"t.SetTextSize(0.025);\n",
"t.SetTextAlign(12);\n",
"t.DrawText(2, 20.3, \"ROOT is based on CLING, a powerful C/C++ interpreter.\");\n",
"t.DrawText(2, 19.3, \"Blocks of lines can be entered within {...}.\");\n",
"t.DrawText(2, 18.3, \"Previous typed lines can be recalled.\");\n",
"\n",
"t.SetTextFont(72);\n",
"t.SetTextSize(0.026);\n",
"t.DrawText(3, 17, \"Root > float x=5; float y=7;\");\n",
"t.DrawText(3, 16, \"Root > x*sqrt(y)\");\n",
"t.DrawText(3, 14, \"Root > for (int i=2;i<7;i++) printf(\\\"sqrt(%d) = %f\\\\n\\\",i,sqrt(i));\");\n",
"t.DrawText(3, 10, \"Root > TF1 f1(\\\"f1\\\",\\\"sin(x)/x\\\",0,10)\");\n",
"t.DrawText(3, 9, \"Root > f1.Draw()\");\n",
"t.SetTextFont(81);\n",
"t.SetTextSize(0.018);\n",
"t.DrawText(4, 15, \"(float) 13.2288f\");\n",
"t.DrawText(4, 13.3, \"sqrt(2) = 1.414214\");\n",
"t.DrawText(4, 12.7, \"sqrt(3) = 1.732051\");\n",
"t.DrawText(4, 12.1, \"sqrt(4) = 2.000000\");\n",
"t.DrawText(4, 11.5, \"sqrt(5) = 2.236068\");\n",
"t.DrawText(4, 10.9, \"sqrt(6) = 2.449490\");\n",
"\n",
"TPad *pad = new TPad(\"pad\", \"pad\", .2, .05, .8, .35);\n",
"pad->Draw();\n",
"pad->cd();\n",
"pad->SetGrid();\n",
"TF1 *f1 = new TF1(\"f1\", \"sin(x)/x\", 0, 10);\n",
"f1->Draw();"
]
},
{
"cell_type": "markdown",
"id": "53cf5ece",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "963ce1b7",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:04.268380Z",
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"iopub.status.idle": "2026-05-19T20:37:04.502011Z",
"shell.execute_reply": "2026-05-19T20:37:04.501646Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
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"\n",
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"\n",
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"text/plain": [
""
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"metadata": {},
"output_type": "display_data"
}
],
"source": [
"%jsroot on\n",
"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++"
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