{
"cells": [
{
"cell_type": "markdown",
"id": "29cf68fe",
"metadata": {},
"source": [
"# formula1\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": "5a86346e",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:05.249292Z",
"iopub.status.busy": "2026-05-19T20:37:05.249079Z",
"iopub.status.idle": "2026-05-19T20:37:05.633821Z",
"shell.execute_reply": "2026-05-19T20:37:05.612511Z"
}
},
"outputs": [],
"source": [
"TCanvas *c1 = new TCanvas(\"c1\", \"Example with Formula\", 200, 10, 700, 500);"
]
},
{
"cell_type": "markdown",
"id": "083cfc9e",
"metadata": {},
"source": [
"We create a formula object and compute the value of this formula\n",
"for two different values of the x variable."
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "f5c3b42b",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:05.648455Z",
"iopub.status.busy": "2026-05-19T20:37:05.648309Z",
"iopub.status.idle": "2026-05-19T20:37:05.857959Z",
"shell.execute_reply": "2026-05-19T20:37:05.857558Z"
}
},
"outputs": [],
"source": [
"auto form1 = new TFormula(\"form1\", \"sqrt(abs(x))\");\n",
"form1->Eval(2);\n",
"form1->Eval(-45);"
]
},
{
"cell_type": "markdown",
"id": "51787b05",
"metadata": {},
"source": [
"Create a one dimensional function and draw it"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "daa96c4b",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:05.865402Z",
"iopub.status.busy": "2026-05-19T20:37:05.865274Z",
"iopub.status.idle": "2026-05-19T20:37:06.092247Z",
"shell.execute_reply": "2026-05-19T20:37:06.091658Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
"\n",
"
\n",
"\n",
"\n",
"\n"
],
"text/plain": [
""
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"auto fun1 = new TF1(\"fun1\", \"abs(sin(x)/x)\", 0, 10);\n",
"c1->SetGridx();\n",
"c1->SetGridy();\n",
"fun1->Draw();\n",
"c1->Update();"
]
},
{
"cell_type": "markdown",
"id": "2ac78b16",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 4,
"id": "e3c21fee",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:06.093616Z",
"iopub.status.busy": "2026-05-19T20:37:06.093483Z",
"iopub.status.idle": "2026-05-19T20:37:06.339048Z",
"shell.execute_reply": "2026-05-19T20:37:06.328658Z"
}
},
"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
}