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{
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"source": [
"# markerwarning\n",
"\n",
"\n",
"Non-symmetric symbols should be used carefully in plotting.\n",
"These two graphs show how misleading a careless use of symbols can be.\n",
"The two plots represent the same data sets but because of a bad symbol\n",
"choice, the two plots on the top appear further apart than for the bottom\n",
"example.\n",
"\n",
"\n",
"**Author:** 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 08:37 PM."
]
},
{
"cell_type": "code",
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"id": "8c6f8ccd",
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"execution": {
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"shell.execute_reply": "2026-05-19T20:37:18.834635Z"
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"source": [
"const int Nph = 14;\n",
"double np_ph[Nph] = {353.4, 300.2, 254.3, 215.2, 181.0, 151.3, 125.2, 102.7, 83.3, 66.7, 52.5, 40.2, 30.2, 22.0};\n",
"double nc_ph[Nph] = {3.890, 3.734, 3.592, 3.453, 3.342, 3.247, 3.151,\n",
" 3.047, 2.965, 2.858, 2.701, 2.599, 2.486, 2.328};\n",
"double npe_ph[Nph] = {10.068, 9.004, 8.086, 7.304, 6.620, 6.026, 5.504,\n",
" 5.054, 4.666, 4.334, 4.050, 3.804, 3.604, 3.440};\n",
"double nce_ph[Nph] = {0.235, 0.217, 0.210, 0.206, 0.213, 0.223, 0.239,\n",
" 0.260, 0.283, 0.318, 0.356, 0.405, 0.465, 0.545};\n",
"\n",
"const int Nbr = 6;\n",
"double np_br[Nbr] = {357.0, 306.0, 239.0, 168.0, 114.0, 73.0};\n",
"double nc_br[Nbr] = {3.501, 3.275, 3.155, 3.060, 3.053, 3.014};\n",
"double npe_br[Nbr] = {8.000, 11.000, 10.000, 9.000, 9.000, 8.000};\n",
"double nce_br[Nbr] = {0.318, 0.311, 0.306, 0.319, 0.370, 0.429};\n",
"\n",
"TGraphErrors *phUP = new TGraphErrors(Nph, np_ph, nc_ph, npe_ph, nce_ph);\n",
"TGraphErrors *phDN = new TGraphErrors(Nph, np_ph, nc_ph, npe_ph, nce_ph);\n",
"TGraphErrors *brUP = new TGraphErrors(Nbr, np_br, nc_br, npe_br, nce_br);\n",
"TGraphErrors *brDN = new TGraphErrors(Nbr, np_br, nc_br, npe_br, nce_br);\n",
"\n",
"float Top_margin = 0.;\n",
"float Left_margin = 0.025;\n",
"float Right_margin = 0.005;\n",
"float maxPlotPart = 395;\n",
"float Marker_Size = 1.3;\n",
"int Marker_Style = 8;\n",
"\n",
"float Et_200_Min = 0.71;\n",
"float Et_200_Max = 3.80;\n",
"float Et_130_Min = 1.21;\n",
"float Et_130_Max = 3.29;\n",
"\n",
"float Nc_200_Min = 1.31;\n",
"float Nc_200_Max = 4.30;\n",
"float Nc_130_Min = 1.51;\n",
"float Nc_130_Max = 3.89;\n",
"\n",
"TCanvas *canvasNc = new TCanvas(\"canvasNc\", \"Multiplicity\", 630, 10, 600, 500);\n",
"\n",
"gStyle->SetOptStat(0);\n",
"canvasNc->SetFillColor(10);\n",
"canvasNc->SetBorderSize(0);"
]
},
{
"cell_type": "markdown",
"id": "df640521",
"metadata": {},
"source": [
"Primitives in Nc200 pad"
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "b4b8cff2",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:18.837120Z",
"iopub.status.busy": "2026-05-19T20:37:18.837005Z",
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"shell.execute_reply": "2026-05-19T20:37:19.056644Z"
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"outputs": [],
"source": [
"TPad *padNcUP = new TPad(\"padNcUP\", \"200 GeV\", 0.07, 0.60, 1., 1.00);\n",
"padNcUP->Draw();\n",
"padNcUP->cd();\n",
"padNcUP->SetFillColor(10);\n",
"padNcUP->SetFrameFillColor(10);\n",
"padNcUP->SetBorderSize(0);\n",
"padNcUP->SetLeftMargin(Left_margin);\n",
"padNcUP->SetRightMargin(Right_margin);\n",
"padNcUP->SetTopMargin(Top_margin + 0.005);\n",
"padNcUP->SetBottomMargin(0.00);\n",
"\n",
"TH1F *frameNcUP = new TH1F(\"frameNcUP\", \"\", 100, 0, maxPlotPart);\n",
"frameNcUP->GetYaxis()->SetLabelOffset(0.005);\n",
"frameNcUP->GetYaxis()->SetLabelSize(0.10);\n",
"frameNcUP->SetMinimum(Nc_200_Min);\n",
"frameNcUP->SetMaximum(Nc_200_Max);\n",
"frameNcUP->SetNdivisions(505, \"Y\");\n",
"frameNcUP->SetNdivisions(505, \"X\");\n",
"frameNcUP->Draw();\n",
"\n",
"brUP->SetMarkerStyle(22);\n",
"brUP->SetMarkerSize(2.0);\n",
"brUP->Draw(\"P\");\n",
"\n",
"phDN->SetMarkerStyle(23);\n",
"phDN->SetMarkerSize(2);\n",
"phDN->Draw(\"P\");\n",
"\n",
"canvasNc->cd();"
]
},
{
"cell_type": "markdown",
"id": "400dcce8",
"metadata": {},
"source": [
"Primitives in Nc130 pad"
]
},
{
"cell_type": "code",
"execution_count": 3,
"id": "eb65459e",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:19.083704Z",
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"shell.execute_reply": "2026-05-19T20:37:19.293645Z"
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"outputs": [],
"source": [
"TPad *padNcDN = new TPad(\"padNcDN\", \"130 GeV\", 0.07, 0.02, 1., 0.60);\n",
"padNcDN->Draw();\n",
"padNcDN->cd();\n",
"padNcDN->SetFillColor(10);\n",
"padNcDN->SetFrameFillColor(10);\n",
"padNcDN->SetBorderSize(0);\n",
"padNcDN->SetLeftMargin(Left_margin);\n",
"padNcDN->SetRightMargin(Right_margin);\n",
"padNcDN->SetTopMargin(Top_margin + 0.005);\n",
"padNcDN->SetBottomMargin(0.30);\n",
"\n",
"TH1F *frameNcDN = new TH1F(\"frameNcDN\", \"\", 100, 0, maxPlotPart);\n",
"frameNcDN->GetYaxis()->SetLabelOffset(0.005);\n",
"frameNcDN->GetYaxis()->SetLabelSize(0.07);\n",
"frameNcDN->GetXaxis()->SetLabelOffset(0.005);\n",
"frameNcDN->GetXaxis()->SetLabelSize(0.07);\n",
"frameNcDN->SetMinimum(Nc_200_Min);\n",
"frameNcDN->SetMaximum(Nc_200_Max);\n",
"frameNcDN->SetNdivisions(505, \"Y\");\n",
"frameNcDN->SetNdivisions(505, \"X\");\n",
"frameNcDN->Draw();\n",
"\n",
"brDN->SetMarkerStyle(23);\n",
"brDN->SetMarkerSize(2.0);\n",
"brDN->Draw(\"P\");\n",
"\n",
"phUP->SetMarkerStyle(22);\n",
"phUP->SetMarkerSize(2);\n",
"phUP->Draw(\"P\");\n",
"\n",
"TLatex t1;\n",
"t1.SetTextFont(12);\n",
"t1.SetTextSize(0.0525);\n",
"t1.DrawLatex(-5, 0.6,\n",
" \"Non-symmetric symbols should be used carefully in plotting.\"\n",
" \"These two graphs show how misleading\");\n",
"t1.DrawLatex(-5, 0.4,\n",
" \"a careless use of symbols can be. The two plots represent \"\n",
" \"the same data sets but because of a bad\");\n",
"t1.DrawLatex(-5, 0.2,\n",
" \"symbol choice, the two plots on the top appear further apart \"\n",
" \"than for the bottom example.\");\n",
"\n",
"canvasNc->cd();"
]
},
{
"cell_type": "markdown",
"id": "1610fe48",
"metadata": {},
"source": [
"Draw all canvases "
]
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"source": [
"gROOT->GetListOfCanvases()->Draw()"
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