RGraphFunctions.cpp File Reference

#include "RGraphFunctions.hh"
#include "RTreeFunctions.hh"

Functions
TGraph *	RGraphDifference (int n, const Double_t *t1, const Double_t *t2)
TGraph *	RGraphDifference (int n, const Double_t xmin, const Double_t xmax, const Double_t *t1, const Double_t *t2)
TGraphErrors *	RCreateYmeanGraph (TH2 *hptr, const string &options)
TGraphErrors *	RConcatGraph (TGraphErrors *gtot, const TGraphErrors *gnew)
TGraphErrors *	RConcatGraph (TGraphErrors *gtot, const TGraph *gnew)
TGraph *	RConcatGraph (TGraph *gtot, const TGraph *gnew)
Int_t	RGetGraphSeries (const Int_t n, const Double_t *p, const Double_t *x, const Double_t *y, const Double_t *dx, const Double_t *dy, TGraphErrors *&tab_gr, Double_t *&tab_p, const Double_t eps)
Int_t	RGetPolyLineSeries (const Int_t n, const Double_t *p, const Double_t *x, const Double_t *y, TPolyLine *&tab_l, Double_t *&tab_p, const Double_t eps)
Int_t	RGetPolyLine3DSeries (const Int_t n, const Double_t *p, const Double_t *x, const Double_t *y, const Double_t *z, TPolyLine3D *&tab_l, Double_t *&tab_p, const Double_t eps)
TGraph *	RGraphFromTree (TTree &tree, const string &varx, const string &vary, const string &selection)
TGraphErrors *	RGraphFromTree (TTree &tree, const string &varx, const string &vary, const string &errx="", const string &erry="", const string &selection="")
TGraphErrors **	RGraphSerieFromTree (TTree &tree, const string &varc, u_int n, double ctab[], const string &varx, const string &vary, const string &errx, const string &erry, const string &selection, double prec)

Detailed Description

Source file for functions related to ROOT TGraph class.

Function Documentation

TGraph* RGraphDifference	(	int	n,
		const Double_t *	t1,
		const Double_t *	t2
	)

Create a graph from the difference between 2 arrays (with same size). The X coordinate for the graph is set as the point number.

Parameters

n	arrays size
t1	first array
t2	second array

References RGraphDifference().

Referenced by RGraphDifference().

TGraph* RGraphDifference	(	int	n,
		const Double_t	xmin,
		const Double_t	xmax,
		const Double_t *	t1,
		const Double_t *	t2
	)

Create a graph from the difference between 2 arrays (with same size). The X coordinate for the graph is computed from xmin to xmax, with constant interval.

Parameters

n	arrays size
xmin	X coordimate of the first point
xmax	X coordimate of the last point
t1	first array
t2	second array

TGraphErrors* RCreateYmeanGraph	(	TH2 *	hptr,
		const string &	options
	)

Create a TGraphErrors (that must be deleted by the calling function) from a 2D histogram. For each X bin of the histogram, the function computes an average value (and an associated error) of the data along Y. By default, the errors for each point are taken as RMS/sqrt(N), except if the "RMS" option is set.

Parameters

hptr

pointer to the 2D histogram

options

the options may specify some limitations on 2D histogram data to be accepted for building the graph: "Smin=<val>": minimum sum value along Y to keep the point in the graph "Amin=<val>": minimum value for the maximum along Y to keep the point in the graph "Vmin=<val>": minimum count to consider the point in the average for the corresponding graph point "Xoff=<val>": shift of X axis (for better lisibility of multiple graphs) "RMS": graph error bars are the RMS instead of the center uncertainty

TGraphErrors* RConcatGraph	(	TGraphErrors *	gtot,
		const TGraphErrors *	gnew
	)

Add points from the graph
gnew to the graph gtot. This function is defined because the Merge() function from TGraphErrors class does not include the errors (ROOT 5.28).

Parameters

gtot	graph that receives new points
gnew	graph to be added

TGraphErrors* RConcatGraph	(	TGraphErrors *	gtot,
		const TGraph *	gnew
	)

Add points from the graph
gnew to the graph gtot. This function is defined because the Merge() function from TGraphErrors class does not include the errors (ROOT 5.28).

Parameters

gtot	graph that receives new points
gnew	graph to be added

TGraph* RConcatGraph	(	TGraph *	gtot,
		const TGraph *	gnew
	)

Add points from the graph
gnew to the graph gtot. This function is defined because the Merge() function from TGraphErrors class does not include the errors (ROOT 5.28).

Parameters

gtot	graph that receives new points
gnew	graph to be added

Int_t RGetGraphSeries	(	const Int_t	n,
		const Double_t *	p,
		const Double_t *	x,
		const Double_t *	y,
		const Double_t *	dx,
		const Double_t *	dy,
		TGraphErrors *&	tab_gr,
		Double_t *&	tab_p,
		const Double_t	eps
	)

Pour des tableaux de données p, x, y, la fonction crée un tableau de graphes (x,y) pour chacune des valeurs de p. Les graphes sont de type TGraphErrors, et si les tableaux pour les erreurs sur x et/ou y sont NULL, les erreurs correspondantes sont mises à 0. La fonction retourne le nombre de graphes, qui correspond au nombre de valeurs différentes de p.

Parameters

n	nombre de données dans les tableaux
p	table des valeurs qui sont comparées
x	table des abscisses des graphes
y	table des ordonnées des graphes
dx	table des erreurs en abscisses (NULL si ignorées)
dy	table des erreurs en ordonnées (NULL si ignorées)
tab_gr	table des graphes en retour
tab_p	table des valeurs de p pour chaque graphe en retour
eps	précision pour test d'égalité des valeurs de p

Int_t RGetPolyLineSeries	(	const Int_t	n,
		const Double_t *	p,
		const Double_t *	x,
		const Double_t *	y,
		TPolyLine *&	tab_l,
		Double_t *&	tab_p,
		const Double_t	eps
	)

Pour des tableaux de données p, x, y, la fonction crée un tableau de lignes TPolyLine (x,y) pour chacune des valeurs de p. La fonction retourne le nombre de lignes, qui correspond au nombre de valeurs différentes de p.

Parameters

n	nombre de données dans les tableaux
p	table des valeurs qui sont comparées
x	table des abscisses des points
y	table des ordonnées des points
tab_l	table des polylines en retour
tab_p	table des valeurs de p pour chaque polyline en retour
eps	précision pour test d'égalité des valeurs de p

Int_t RGetPolyLine3DSeries	(	const Int_t	n,
		const Double_t *	p,
		const Double_t *	x,
		const Double_t *	y,
		const Double_t *	z,
		TPolyLine3D *&	tab_l,
		Double_t *&	tab_p,
		const Double_t	eps
	)

Pour des tableaux de données p, x, y, la fonction crée un tableau de lignes TPolyLine (x,y) pour chacune des valeurs de p. La fonction retourne le nombre de lignes, qui correspond au nombre de valeurs différentes de p.

Parameters

n	nombre de données dans les tableaux
p	table des valeurs qui sont comparées
x	table des coordonnées X
y	table des coordonnées Y
z	table des coordonnées Z
tab_l	table des polylines en retour
tab_p	table des valeurs de p pour chaque polyline en retour
eps	précision pour test d'égalité des valeurs de p

TGraph* RGraphFromTree	(	TTree &	tree,
		const string &	varx,
		const string &	vary,
		const string &	selection
	)

Create a TGraph from a TTree, with selection conditions.

Parameters

tree	source TTree
varx	name of parameter for variable X of the graph
vary	name of parameter for variable Y of the graph
selection	conditions for events selection

References RGetTreeFormula(), and RIsTreeFormula().

Referenced by RGraphSerieFromTree().

TGraphErrors* RGraphFromTree	(	TTree &	tree,
		const string &	varx,
		const string &	vary,
		const string &	errx = "",
		const string &	erry = "",
		const string &	selection = ""
	)

Create a TGraphErrors from a TTree, with selection conditions. The variables may be aliases of the tree.

Parameters

tree	source TTree
varx	name of parameter for variable X of the graph
vary	name of parameter for variable Y of the graph
errx	name of parameter for error X of the graph
erry	name of parameter for error Y of the graph
selection	conditions for events selection

References RGetTreeFormula(), and RIsTreeFormula().

TGraphErrors** RGraphSerieFromTree	(	TTree &	tree,
		const string &	varc,
		u_int	n,
		double	ctab[],
		const string &	varx,
		const string &	vary,
		const string &	errx,
		const string &	erry,
		const string &	selection,
		double	prec
	)

Create a serie of TGraphErrors from a TTree, with selection conditions, creating one TGraph for each value of the selection variable. Each graph pointer and the array of pointers must be deleted by the calling program.

Parameters

tree	source TTree
varc	name of the selection variable for graphs
n	number of values of the selection variable
ctab	array of values of the selection variable
varx	name of parameter for variable X of the graph
varx	name of parameter for variable X of the graph
vary	name of parameter for variable Y of the graph
errx	name of parameter for error X of the graph
erry	name of parameter for error Y of the graph
selection	conditions for events selection
prec	conditions relative precision for selected graphs variable

References RGraphFromTree(), and RTreeSelectEq().