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"# hist028_THStack_multicolor\n",
"```cpp\n",
" root > .x multicolor.C\n",
" root > .x multicolor.C(1)\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 08:12 PM."
]
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" Arguments are defined. "
]
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"source": [
"Int_t isStack = 0;"
]
},
{
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"id": "8136cce7",
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"TCanvas *c1 = new TCanvas;\n",
"Int_t nbins = 20;\n",
"TH2F *h1 = new TH2F(\"h1\", \"h1\", nbins, -4, 4, nbins, -4, 4);\n",
"h1->SetFillColor(kBlue);\n",
"TH2F *h2 = new TH2F(\"h2\", \"h2\", nbins, -4, 4, nbins, -4, 4);\n",
"h2->SetFillColor(kRed);\n",
"TH2F *h3 = new TH2F(\"h3\", \"h3\", nbins, -4, 4, nbins, -4, 4);\n",
"h3->SetFillColor(kYellow);\n",
"THStack *hs = new THStack(\"hs\", \"three plots\");\n",
"hs->Add(h1);\n",
"hs->Add(h2);\n",
"hs->Add(h3);\n",
"TRandom r;\n",
"Int_t i;\n",
"for (i = 0; i < 20000; i++)\n",
" h1->Fill(r.Gaus(), r.Gaus());\n",
"for (i = 0; i < 200; i++) {\n",
" Int_t ix = (Int_t)r.Uniform(0, nbins);\n",
" Int_t iy = (Int_t)r.Uniform(0, nbins);\n",
" Int_t bin = h1->GetBin(ix, iy);\n",
" Double_t val = h1->GetBinContent(bin);\n",
" if (val <= 0)\n",
" continue;\n",
" if (!isStack)\n",
" h1->SetBinContent(bin, 0);\n",
" if (r.Rndm() > 0.5) {\n",
" if (!isStack)\n",
" h2->SetBinContent(bin, 0);\n",
" h3->SetBinContent(bin, val);\n",
" } else {\n",
" if (!isStack)\n",
" h3->SetBinContent(bin, 0);\n",
" h2->SetBinContent(bin, val);\n",
" }\n",
"}\n",
"hs->Draw(\"lego1\");"
]
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"id": "215d1ff5",
"metadata": {},
"source": [
"Draw all canvases "
]
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