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    "# tree141_parallelcoord\n",
    "Script illustrating the use of the TParallelCoord class\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "**Author:**  Bastien Dallapiazza  \n",
    "<i><small>This notebook tutorial was automatically generated with <a href= \"https://github.com/root-project/root/blob/master/documentation/doxygen/converttonotebook.py\">ROOTBOOK-izer</a> from the macro found in the ROOT repository  on Tuesday, May 19, 2026 at 08:19 PM.</small></i>"
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   "source": [
    "%%cpp -d\n",
    "#include \"TFile.h\"\n",
    "#include \"TCanvas.h\"\n",
    "#include \"TStyle.h\"\n",
    "#include \"TRandom.h\"\n",
    "#include \"TNtuple.h\"\n",
    "#include \"TParallelCoord.h\"\n",
    "#include \"TParallelCoordVar.h\"\n",
    "#include \"TParallelCoordRange.h\"\n",
    "\n",
    "Double_t r1, r2, r3, r4, r5, r6, r7, r8, r9;\n",
    "Double_t dr = 3.5;\n",
    "TRandom *r;"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1499f8af",
   "metadata": {},
   "source": [
    " Definition of a helper function: "
   ]
  },
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   "execution_count": 2,
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   "source": [
    "%%cpp -d\n",
    "void generate_random(Int_t i)\n",
    "{\n",
    "   r1 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r2 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r7 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r9 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r4 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r3 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r5 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r6 = (2 * dr * r->Rndm(i)) - dr;\n",
    "   r8 = (2 * dr * r->Rndm(i)) - dr;\n",
    "}"
   ]
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   "execution_count": 3,
   "id": "fb431011",
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   "source": [
    "TNtuple *nt = nullptr;\n",
    "\n",
    "Double_t s1x, s1y, s1z;\n",
    "Double_t s2x, s2y, s2z;\n",
    "Double_t s3x, s3y, s3z;\n",
    "r = new TRandom();;\n",
    "\n",
    "new TCanvas(\"c1\", \"c1\",0,0,800,700);\n",
    "\n",
    "nt = new TNtuple(\"nt\",\"Demo ntuple\",\"x:y:z:u:v:w\");\n",
    "\n",
    "for (Int_t i = 0; i < 20000; i++) {\n",
    "   r->Sphere(s1x, s1y, s1z, 0.1);\n",
    "   r->Sphere(s2x, s2y, s2z, 0.2);\n",
    "   r->Sphere(s3x, s3y, s3z, 0.05);\n",
    "\n",
    "   generate_random(i);\n",
    "   nt->Fill(r1, r2, r3, r4, r5, r6);\n",
    "\n",
    "   generate_random(i);\n",
    "   nt->Fill(s1x, s1y, s1z, s2x, s2y, s2z);\n",
    "\n",
    "   generate_random(i);\n",
    "   nt->Fill(r1, r2, r3, r4, r5, r6);\n",
    "\n",
    "   generate_random(i);\n",
    "   nt->Fill(s2x-1, s2y-1, s2z, s1x+.5, s1y+.5, s1z+.5);\n",
    "\n",
    "   generate_random(i);\n",
    "   nt->Fill(r1, r2, r3, r4, r5, r6);\n",
    "\n",
    "   generate_random(i);\n",
    "   nt->Fill(s1x+1, s1y+1, s1z+1, s3x-2, s3y-2, s3z-2);\n",
    "\n",
    "   generate_random(i);\n",
    "   nt->Fill(r1, r2, r3, r4, r5, r6);\n",
    "}\n",
    "nt->Draw(\"x:y:z:u:v:w\", \"\", \"para\", 5000);\n",
    "auto para = (TParallelCoord*)gPad->GetListOfPrimitives()->FindObject(\"ParaCoord\");\n",
    "para->SetDotsSpacing(5);\n",
    "auto firstaxis = (TParallelCoordVar*)para->GetVarList()->FindObject(\"x\");\n",
    "firstaxis->AddRange(new TParallelCoordRange(firstaxis, 0.846018, 1.158469));\n",
    "para->AddSelection(\"violet\");\n",
    "para->GetCurrentSelection()->SetLineColor(kViolet);\n",
    "firstaxis->AddRange(new TParallelCoordRange(firstaxis, -0.169447, 0.169042));\n",
    "para->AddSelection(\"Orange\");\n",
    "para->GetCurrentSelection()->SetLineColor(kOrange+9);\n",
    "firstaxis->AddRange(new TParallelCoordRange(firstaxis, -1.263024, -0.755292));"
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