{
"cells": [
{
"cell_type": "markdown",
"id": "9fb2376b",
"metadata": {},
"source": [
"# hist024_THStack_pads\n",
"\n",
"In this example three histograms are displayed on separate pads.\n",
"If canvas divided in advance - provided subpads will be used by the THStack.\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Sergey Linev \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": "4ce65e25",
"metadata": {
"collapsed": false,
"execution": {
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"shell.execute_reply": "2026-05-19T20:12:28.366508Z"
}
},
"outputs": [],
"source": [
"auto hs = new THStack(\"hs\", \"Stacked 1D histograms\");"
]
},
{
"cell_type": "markdown",
"id": "9d14ba38",
"metadata": {},
"source": [
"Create three 1-d histograms and add them in the stack"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "c29d5eb7",
"metadata": {
"collapsed": false,
"execution": {
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"shell.execute_reply": "2026-05-19T20:12:28.691468Z"
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"outputs": [],
"source": [
"auto h1st = new TH1F(\"h1st\", \"test hstack 1\", 100, -4, 4);\n",
"h1st->FillRandom(\"gaus\", 20000);\n",
"hs->Add(h1st);\n",
"\n",
"auto h2st = new TH1F(\"h2st\", \"test hstack 2\", 100, -4, 4);\n",
"h2st->FillRandom(\"gaus\", 15000);\n",
"hs->Add(h2st);\n",
"\n",
"auto h3st = new TH1F(\"h3st\", \"test hstack 3\", 100, -4, 4);\n",
"h3st->FillRandom(\"gaus\", 10000);\n",
"hs->Add(h3st);\n",
"\n",
"auto c1 = new TCanvas(\"c1\", \"THStack drawing on pads\", 800, 800);"
]
},
{
"cell_type": "markdown",
"id": "6e848827",
"metadata": {},
"source": [
"prepare subpads for drawing of histograms"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "6aee6fdd",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:12:28.693504Z",
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"shell.execute_reply": "2026-05-19T20:12:28.896631Z"
}
},
"outputs": [],
"source": [
"c1->Divide(1, 3);"
]
},
{
"cell_type": "markdown",
"id": "eda529fc",
"metadata": {},
"source": [
"draw thstack on canvas with \"pads\" draw option"
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "b4ae0d85",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:12:28.906295Z",
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"shell.execute_reply": "2026-05-19T20:12:29.108600Z"
}
},
"outputs": [],
"source": [
"c1->Add(hs, \"pads\");"
]
},
{
"cell_type": "markdown",
"id": "7ffba9e7",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 5,
"id": "d7c9ab19",
"metadata": {
"collapsed": false,
"execution": {
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"shell.execute_reply": "2026-05-19T20:12:29.313638Z"
}
},
"outputs": [
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],
"source": [
"gROOT->GetListOfCanvases()->Draw()"
]
}
],
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