{
"cells": [
{
"cell_type": "markdown",
"id": "64fd1b18",
"metadata": {},
"source": [
"# pad2png\n",
"Create a canvas and save as png.\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Valeriy Onuchin \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:38 PM."
]
},
{
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"id": "68e245d7",
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"execution": {
"iopub.execute_input": "2026-05-19T20:38:46.956047Z",
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"shell.execute_reply": "2026-05-19T20:38:47.532709Z"
}
},
"outputs": [],
"source": [
"TCanvas *c = new TCanvas;\n",
"TH1F *h = new TH1F(\"gaus\", \"gaus\", 100, -5, 5);\n",
"h->FillRandom(\"gaus\", 10000);\n",
"h->Draw();\n",
"\n",
"gSystem->ProcessEvents();\n",
"\n",
"TImage *img = TImage::Create();\n",
"\n",
"img->FromPad(c);\n",
"\n",
"img->WriteImage(\"canvas.png\");"
]
},
{
"cell_type": "markdown",
"id": "962cf37e",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "692b81b3",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:38:47.535290Z",
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"shell.execute_reply": "2026-05-19T20:38:47.746875Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
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"\n",
"\n"
],
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},
"metadata": {},
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}
],
"source": [
"gROOT->GetListOfCanvases()->Draw()"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "ROOT C++",
"language": "c++",
"name": "root"
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