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"source": [
"# gr009_bent_err\n",
"Graph with bent error bars. Inspired from work of Olivier Couet.\n",
"\n",
"See the [TGraphBentErrors documentation](https://root.cern/doc/master/classTGraphBentErrors.html)\n",
"\n",
"exl / exh: low and high (left/right) errors in x; similar for y\n",
"e*d: delta, in axis units, to be added/subtracted (if >0 or <0) in x or y from\n",
"the data point's position to use as end point of the corresponding error\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Alberto Ferro \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."
]
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"source": [
"import ROOT\n",
"\n",
"c1 = ROOT.TCanvas()\n",
"n = 10\n",
"x = ROOT.std.vector(\"double\")() # The equivalent is also achieveable with numpy arrays\n",
"for i in [-0.22, 0.05, 0.25, 0.35, 0.5, 0.61, 0.7, 0.85, 0.89, 0.95]:\n",
" x.push_back(i)\n",
"y = ROOT.std.vector(\"double\")()\n",
"for i in [1, 2.9, 5.6, 7.4, 9, 9.6, 8.7, 6.3, 4.5, 1]:\n",
" y.push_back(i)\n",
"exl = ROOT.std.vector(\"double\")()\n",
"for i in [0.05, 0.1, 0.07, 0.07, 0.04, 0.05, 0.06, 0.07, 0.08, 0.05]:\n",
" exl.push_back(i)\n",
"eyl = ROOT.std.vector(\"double\")()\n",
"for i in [0.8, 0.7, 0.6, 0.5, 0.4, 0.4, 0.5, 0.6, 0.7, 0.8]:\n",
" eyl.push_back(i)\n",
"exh = ROOT.std.vector(\"double\")()\n",
"for i in [0.02, 0.08, 0.05, 0.05, 0.03, 0.03, 0.04, 0.05, 0.06, 0.03]:\n",
" exh.push_back(i)\n",
"eyh = ROOT.std.vector(\"double\")()\n",
"for i in [0.6, 0.5, 0.4, 0.3, 0.2, 0.2, 0.3, 0.4, 0.5, 0.6]:\n",
" eyh.push_back(i)\n",
"exld = ROOT.std.vector(\"double\")()\n",
"for i in [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]:\n",
" exld.push_back(i)\n",
"eyld = ROOT.std.vector(\"double\")()\n",
"for i in [0.0, 0.0, 0.05, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]:\n",
" eyld.push_back(i)\n",
"exhd = ROOT.std.vector(\"double\")()\n",
"for i in [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]:\n",
" exhd.push_back(i)\n",
"eyhd = ROOT.std.vector(\"double\")()\n",
"for i in [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.05, 0.0]:\n",
" eyhd.push_back(i)\n",
"\n",
"gr = ROOT.TGraphBentErrors(\n",
" n,\n",
" x.data(),\n",
" y.data(),\n",
" exl.data(),\n",
" exh.data(),\n",
" eyl.data(),\n",
" eyh.data(),\n",
" exld.data(),\n",
" exhd.data(),\n",
" eyld.data(),\n",
" eyhd.data(),\n",
")\n",
"\n",
"gr.SetTitle(\"TGraphBentErrors Example\")\n",
"gr.SetMarkerColor(4)\n",
"gr.SetMarkerStyle(21)\n",
"gr.Draw(\"ALP\")"
]
},
{
"cell_type": "markdown",
"id": "0b43b774",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
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"execution_count": 2,
"id": "f235cb13",
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],
"source": [
"%jsroot on\n",
"from ROOT import gROOT \n",
"gROOT.GetListOfCanvases().Draw()"
]
}
],
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