{
"cells": [
{
"cell_type": "markdown",
"id": "f4aef70b",
"metadata": {},
"source": [
"# hist063_TH1_seism\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 08:13 PM."
]
},
{
"cell_type": "code",
"execution_count": 1,
"id": "fdd3d00a",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:13:15.474465Z",
"iopub.status.busy": "2026-05-19T20:13:15.474334Z",
"iopub.status.idle": "2026-05-19T20:13:15.794888Z",
"shell.execute_reply": "2026-05-19T20:13:15.794107Z"
}
},
"outputs": [],
"source": [
"TStopwatch sw;\n",
"sw.Start();"
]
},
{
"cell_type": "markdown",
"id": "101ba4ad",
"metadata": {},
"source": [
"set time offset"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "f829e1e0",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:13:15.796647Z",
"iopub.status.busy": "2026-05-19T20:13:15.796507Z",
"iopub.status.idle": "2026-05-19T20:13:19.596800Z",
"shell.execute_reply": "2026-05-19T20:13:19.596249Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
"\n",
"
\n",
"\n",
"\n",
"\n"
],
"text/plain": [
""
]
},
"metadata": {},
"output_type": "display_data"
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"Real Time = 3.912s, Cpu Time = 3.780s\n"
]
}
],
"source": [
"TDatime dtime;\n",
"gStyle->SetTimeOffset(dtime.Convert());\n",
"\n",
"TCanvas *c1 = new TCanvas(\"c1\", \"Time on axis\", 10, 10, 1000, 500);\n",
"c1->SetGrid();\n",
"\n",
"Float_t bintime = 1; // one bin = 1 second. change it to set the time scale\n",
"TH1F *ht = new TH1F(\"ht\", \"The ROOT seism\", 10, 0, 10 * bintime);\n",
"Float_t signalval = 1000;\n",
"ht->SetMaximum(signalval);\n",
"ht->SetMinimum(-signalval);\n",
"ht->SetStats(false);\n",
"ht->SetLineColor(2);\n",
"ht->GetXaxis()->SetTimeDisplay(1);\n",
"ht->GetYaxis()->SetNdivisions(520);\n",
"ht->Draw();\n",
"\n",
"for (Int_t i = 1; i < 2300; i++) {\n",
" //======= Build a signal : noisy damped sine ======\n",
" Float_t noise = gRandom->Gaus(0, 120);\n",
" if (i > 700)\n",
" noise += signalval * sin((i - 700.) * 6.28 / 30) * exp((700. - i) / 300.);\n",
" ht->SetBinContent(i, noise);\n",
" c1->Modified();\n",
" c1->Update();\n",
" gSystem->ProcessEvents(); // canvas can be edited during the loop\n",
"}\n",
"printf(\"Real Time = %8.3fs, Cpu Time = %8.3fs\\n\", sw.RealTime(), sw.CpuTime());"
]
},
{
"cell_type": "markdown",
"id": "ad5e3cfc",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "c5465644",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:13:19.598834Z",
"iopub.status.busy": "2026-05-19T20:13:19.598707Z",
"iopub.status.idle": "2026-05-19T20:13:19.805721Z",
"shell.execute_reply": "2026-05-19T20:13:19.804917Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
"\n",
"
\n",
"\n",
"\n",
"\n"
],
"text/plain": [
""
]
},
"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++"
}
},
"nbformat": 4,
"nbformat_minor": 5
}