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"# annotation3d\n",
"polylines. It also demonstrates how the axis labels can be modified.\n",
"It was created for the book:\n",
"[Statistical Methods for Data Analysis in Particle Physics](http://www.springer.com/la/book/9783319201757)\n",
"\n",
"\n",
"\n",
"**Author:** Luca Lista, Olivier Couet \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:36 PM."
]
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"auto c = new TCanvas(\"c\", \"c\", 600, 600);\n",
"c->SetTheta(30);\n",
"c->SetPhi(50);\n",
"gStyle->SetOptStat(0);\n",
"gStyle->SetHistTopMargin(0);\n",
"gStyle->SetOptTitle(kFALSE);"
]
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{
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"id": "7923a797",
"metadata": {},
"source": [
"Define and draw a surface"
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"auto f = new TF2(\"f\", \"[0]*cos(x)*cos(y)\", -1, 1, -1, 1);\n",
"f->SetParameter(0, 1);\n",
"double s = 1. / f->Integral(-1, 1, -1, 1);\n",
"f->SetParameter(0, s);\n",
"f->SetNpx(50);\n",
"f->SetNpy(50);\n",
"\n",
"f->GetXaxis()->SetTitle(\"x\");\n",
"f->GetXaxis()->SetTitleOffset(1.4);\n",
"f->GetXaxis()->SetTitleSize(0.04);\n",
"f->GetXaxis()->CenterTitle();\n",
"f->GetXaxis()->SetNdivisions(505);\n",
"f->GetXaxis()->SetTitleOffset(1.3);\n",
"f->GetXaxis()->SetLabelSize(0.03);\n",
"f->GetXaxis()->ChangeLabelByValue(-0.5, -1, -1, -1, kRed, -1, \"X_{0}\");\n",
"\n",
"f->GetYaxis()->SetTitle(\"y\");\n",
"f->GetYaxis()->CenterTitle();\n",
"f->GetYaxis()->SetTitleOffset(1.4);\n",
"f->GetYaxis()->SetTitleSize(0.04);\n",
"f->GetYaxis()->SetTitleOffset(1.3);\n",
"f->GetYaxis()->SetNdivisions(505);\n",
"f->GetYaxis()->SetLabelSize(0.03);\n",
"\n",
"f->GetZaxis()->SetTitle(\"dP/dx\");\n",
"f->GetZaxis()->CenterTitle();\n",
"f->GetZaxis()->SetTitleOffset(1.3);\n",
"f->GetZaxis()->SetNdivisions(505);\n",
"f->GetZaxis()->SetTitleSize(0.04);\n",
"f->GetZaxis()->SetLabelSize(0.03);\n",
"\n",
"f->SetLineWidth(1);\n",
"f->SetLineColorAlpha(kAzure - 2, 0.3);\n",
"\n",
"c->Add(f, \"surf1 fb\");"
]
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"cell_type": "markdown",
"id": "075e9a1d",
"metadata": {},
"source": [
"Lines for 3D annotation"
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"id": "b7328af3",
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"double x[11] = {-0.500, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.5, -0.500};\n",
"double y[11] = {-0.985, -0.8, -0.6, -0.4, -0.2, 0.0, 0.2, 0.4, 0.6, 0.8, 0.985};\n",
"double z[11];\n",
"for (int i = 0; i < 11; ++i)\n",
" z[i] = s * cos(x[i]) * cos(y[i]);\n",
"auto g2 = new TPolyLine3D(11, x, y, z);\n",
"\n",
"double xx[2] = {-0.5, -0.5};\n",
"double yy[2] = {-0.985, -0.985};\n",
"double zz[2] = {0.11, s * cos(-0.5) * cos(-0.985)};\n",
"auto l2 = new TPolyLine3D(2, xx, yy, zz);\n",
"\n",
"g2->SetLineColor(kRed);\n",
"g2->SetLineWidth(3);\n",
"c->Add(g2);\n",
"\n",
"l2->SetLineColor(kRed);\n",
"l2->SetLineStyle(kDashed);\n",
"l2->SetLineWidth(1);\n",
"c->Add(l2);"
]
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{
"cell_type": "markdown",
"id": "1a25db94",
"metadata": {},
"source": [
"Draw text Annotations"
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"execution_count": 4,
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"outputs": [],
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"auto txt = new TAnnotation(-0.45, -0.2, 0.33, \"f(y,x_{0})\");\n",
"txt->SetTextFont(42);\n",
"txt->SetTextColor(kRed);\n",
"c->Add(txt);\n",
"\n",
"auto txt1 = new TAnnotation(0.5, 0.5, 0.3, \"f(x,y)\");\n",
"txt1->SetTextColor(kBlue);\n",
"txt1->SetTextFont(42);\n",
"c->Add(txt1);"
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"metadata": {},
"source": [
"Draw all canvases "
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