ROOT
v6-22
Reference Guide
df021_createTGraph.C
Go to the documentation of this file.
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/// \file
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/// \ingroup tutorial_dataframe
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/// \notebook -draw
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/// This tutorial shows how to fill a TGraph using the Dataframe.
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///
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/// \macro_code
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/// \macro_image
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///
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/// \date July 2018
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/// \author Enrico Guiraud, Danilo Piparo, Massimo Tumolo
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void
df021_createTGraph
()
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{
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ROOT::EnableImplicitMT
(2);
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ROOT::RDataFrame
d
(160);
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// Create a trivial parabola
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auto
dd =
d
.Alias(
"x"
,
"rdfentry_"
).Define(
"y"
,
"x*x"
);
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auto
graph
= dd.Graph(
"x"
,
"y"
);
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// This tutorial is ran with multithreading enabled. The order in which points are inserted is not known, so to have a meaningful representation points are sorted.
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graph
->Sort();
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auto
c
=
new
TCanvas
();
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graph
->DrawClone(
"APL"
);
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}
d
#define d(i)
Definition:
RSha256.hxx:102
c
#define c(i)
Definition:
RSha256.hxx:101
ROOT::RDataFrame
ROOT's RDataFrame offers a high level interface for analyses of data stored in TTrees,...
Definition:
RDataFrame.hxx:42
TCanvas
The Canvas class.
Definition:
TCanvas.h:27
ROOT::EnableImplicitMT
void EnableImplicitMT(UInt_t numthreads=0)
Enable ROOT's implicit multi-threading for all objects and methods that provide an internal paralleli...
Definition:
TROOT.cxx:526
df021_createTGraph
Definition:
df021_createTGraph.py:1
graph
Definition:
graph.py:1
tutorials
dataframe
df021_createTGraph.C
ROOT v6-22 - Reference Guide Generated on Fri Apr 1 2022 11:53:17 (GVA Time) using Doxygen 1.9.4