HistUtils Namespace Reference

Functions
Double_t	getMeanY (TH1 *hist)
	Get histogram mean value along Y axis. More...
void	invertHist (TH1 *hist)
	Invert histogram. More...
TH1 *	cropHistogram (TH1 *hist, Double_t minX, Double_t maxX)
	Crop histogram to a given range. More...
TH1 *	cropHistogram (TH1 *hist, Int_t minBin, Int_t maxBin)
	Crop histogram to a given bin range. More...
TH2 *	makeHistStack (TList *histList, Double_t axisMin=0, Double_t axisMax=1, const char *name="")
	Make 3D histogram stack. More...

Detailed Description

Useful histogram operations.

Function Documentation

cropHistogram() [1/2]

TH1 * HistUtils::cropHistogram	(	TH1 *	hist,
		Double_t	minX,
		Double_t	maxX
	)

Crop histogram to a given range.

Function finds corresponding bins and returns cropped histogram with bins including the given range.

Parameters

hist	histogram.
minX	minimum value along X axis of the new histogram.
maxX	maximum value along X axis of the new histogram.

Returns

new TH1 histogram.

cropHistogram() [2/2]

TH1 * HistUtils::cropHistogram	(	TH1 *	hist,
		Int_t	minBin,
		Int_t	maxBin
	)

Crop histogram to a given bin range.

Function returns cropped histogram with bin numbers between minBin and maxBin.

Parameters

hist	histogram.
minBin	minimum bin number.
maxBin	maximum bin number.

Returns

new TH1 histogram.

getMeanY()

Double_t HistUtils::getMeanY

(

TH1 *

hist

)

Get histogram mean value along Y axis.

Function returns an average value of counts across all the bins.

Parameters

hist	histogram.

Returns

double value of mean counts.

invertHist()

void HistUtils::invertHist

(

TH1 *

hist

)

Invert histogram.

Function inverts histogram values in each bin.

Parameters

hist	histogram.

makeHistStack()

TH2 * HistUtils::makeHistStack	(	TList *	histList,
		Double_t	axisMin = 0,
		Double_t	axisMax = 1,
		const char *	name = ""
	)

Make 3D histogram stack.

A list of TH1 histograms are aligned one after another in a 3D stack way

Parameters

histList	TList of histograms.
axisMin	minimum new axis number.
axisMax	maximum new axis number.
name	name of returned histogram

Returns

new TH2* histogram.