My commonly used, general functions to manipulate ROOT objects; so I only ever write them once. More...

Functions
void	writeTGraph (TGraph *gr, TString name)
	Sets the name of a TGraph to name and then writes it to the current file. More...

void	printArray (int n, double *array, TString delimiter=", ", TString start="{", TString end="}\n")
	Print all the elements of a c-styles array to the screen for debugging. More...

void	printYVals (TGraph *gr, TString delimiter=", ", TString start="{", TString end="}\n")
	Print all the the y-axis values of a TGraph to the screen for debugging. More...

void	printXVals (TGraph *gr, TString delimiter=", ", TString start="{", TString end="}\n")
	Print all the the x-axis values of a TGraph to the screen for debugging. More...

void	printTGraphInfo (TGraph *gr)
	Print summary information about gr: name, title, number of points, all x and y values. More...

Int_t	getIndexOfMaximum (Int_t len, Double_t *arr)
	Find indices where input is not a number (for debugging). More...

std::vector< Int_t >	getIndicesOfNans (TGraph *gr)
	Find indices where input is not a number (for debugging) More...

Double_t	getSumOfYVals (TGraph *gr)
	Adds up all y-axis values of input TGraph. More...

void	getMaxMin (TGraph *gr, Double_t &max, Double_t &min)
	Scan long TGraph and update the references to the maximum and minimum input values. More...

void	getMeanAndRms (TGraph *gr, Double_t &mean, Double_t &rms)
	Get mean and rms of gr. More...

void	getMaxMin (TGraph *gr, Double_t &maxY, Double_t &maxX, Double_t &minY, Double_t &minX)
	Scan long TGraph and update the references to the maximum and minimum input values. More...

void	getMaxMinWithinLimits (TGraph *gr, Double_t &maxY, Double_t &maxX, Double_t &minY, Double_t &minX, Double_t lowerLimit, Double_t upperLimit)
	Scan long TGraph and update the references to the maximum and minimum input values. More...

void	getLocalMaxToMin (TGraph *gr, Double_t &maxY, Double_t &maxX, Double_t &minY, Double_t &minX)
	Updates input based on absolute largest local maximum to local minimum difference. For pulse finding. More...

void	getLocalMaxToMinWithinLimits (TGraph *gr, Double_t &maxY, Double_t &maxX, Double_t &minY, Double_t &minX, Double_t lowerLimit, Double_t upperLimit)
	Updates input based on absolute largest local maximum to local minimum difference. For pulse finding. More...

Int_t	getPeakBinOfHistogram (TH1D *h)
	Finds the bin containing the maximum value of a TH1D. More...

Double_t	getPeakBinOfHistogram (TH2D *hist, Int_t &binx, Int_t &biny)
	Finds the bin containing the maximum value of a TH2D. More...

Double_t	getLowBinEdgeOfHistogramPeak (TH1D *h)
	Finds the bin containing the maximum value of a TH1D. More...

Double_t	getFullWidthHalfMax (TH1D *h)
	Assumes a nice distribution with a single peak, finds the full width half max. More...

Int_t	getBit (UInt_t bitIndex, UInt_t bitMask)
	For decoding bit masks. More...

Int_t	getNumBitsSet (Int_t numBitsToCheck, UInt_t bitMask)
	For counting how many bits are set to one in a bitmask. More...

Double_t	getDeltaAngleDeg (Double_t angle1, Double_t angle2)
	Do angle1-angle2 (in degrees) and +- 360 such that the result lies in -180 < deltaAngle < 180. More...

void	subtractOffset (TGraph *gr, Double_t offset)
	Subtract a constant value from the y-axis values at each point. More...

void	normalize (TGraph *gr, Double_t &mean, Double_t &rms)
	Modify gr to set mean=0 and rms=1. More...

void	normalize (TGraph *gr)
	Modify gr to set mean=0 and rms=1. More...

void	zeroPadTGraph (TGraph *gr, Int_t newLen, Double_t dt=0)
	Add a bunch of zeros to the end of a TGraph. More...

void	offsetTGraphXAxes (Int_t numGrs, TGraph *grs[], Double_t offsets[])
	Adds a set of offsets to the x-axis values of each respective TGraph. More...

void	multiplyTGraphYAxes (Int_t numGrs, TGraph *grs[], Double_t factors[])
	Multiples a set of factors to the y-axis values of each respective TGraph. More...

void	makeZaxisScaleEqualAboutZero (TH2D *h)
	For nice plotting of 2D dists about 0, makes max = -min. More...

TGraph *	makeNormalized (TGraph *gr)
	Creates new TGraph (leaving original unchanged) with mean = 0 & RMS = 1. More...

TGraph *	makeNormalized (TGraph *gr, Double_t &mean, Double_t &rms)
	Create normalized copy of gr, where mean=0 and rms=1 (input unmodified). More...

TGraph *	makeSortedTGraph (TTree *tree, TString drawText, TString cutString, Double_t wrapValue)
	Plot a time (or any TTree branch) ordered TGraph of some TTree branch. More...

TGraph *	makeLinearlyInterpolatedGraph (TGraph *grIn, Double_t dt)
	Make interpolated TGraph using linear interpolation between points. More...

TGraph *	makeDerivativeTGraph (TGraph *gr)
	Makes a derivative TGraph, contains gr->GetN() - 1 points. More...

TGraph *	makeUnwrappedCorrelationGraph (TGraph *gr)
	Unwraps a circularly correlated graph so the -ve time lies behind the +ve time. More...

TGraph *	interpolateWithStartTime (TGraph *grIn, Double_t startTime, Double_t dt, Int_t nSamp)
	Wrapper function for ROOT's interpolator, can zero pad the front to start from a particular time. More...

TH1D *	plotsZaxisDist (TH2 *h2, TString hName, Int_t nBins, Double_t xMin, Double_t xMax)
	Put Z-axis values of a TH2D histogram into a TH1D histogram. More...

TCanvas *	drawArrayOfHistosPrettily (TH1D hs[], Int_t numHists, TCanvas can=NULL, Double_t *colWeights=NULL)
	Draws an array of histograms with a rainbow on a single TCanvas. More...

TCanvas *	drawArrayOfTGraphsPrettily (TGraph grs[], Int_t numGrs, TString drawOpt="l", TCanvas can=NULL, Double_t *colWeights=NULL)
	Draws an array of TGraphs with a rainbow on a single TCanvas. More...

TLegend *	makeLegend (TGraph *grs[], Int_t numGrs, TString titles[], TString opt="l", Double_t minX=0.8, Double_t minY=0.8, Double_t maxX=1, Double_t maxY=1)
	Generates a TLegend from input arrays of TGraphs and titles (TStrings) More...

TLegend *	makeLegend (TH1D *hs[], Int_t numHists, TString titles[], TString opt="l", Double_t minX=0.8, Double_t minY=0.8, Double_t maxX=1, Double_t maxY=1)
	Generates a TLegend from input arrays of TGraphs and titles (TStrings). More...

void	saveCanvas (TCanvas *c1, TString fileName)
	My function to save a TCanvas for talks, and save an editable version. More...

void	setWhiteZeroColorScale ()
	Set color scale where white is in the middle. More...

void	draw2D (TH2D *hist, TString opt)
	Draw 2D histogram and set bin limits to be symmetrical about zero. More...

Int_t	getColorFracThroughPalette (Int_t index, Int_t maxVal)
	Gets the color a fraction through the current palette. More...

TCanvas *	drawHistsWithStatsBoxes (Int_t numHists, TH1D *hs[], TString drawOpt, TString statsOption)
	Draw histograms on the same (new) canvas with nice stats boxes. More...

TString	getAntName (AnitaPol::AnitaPol_t pol, Int_t antInd)
	Use polarization and index to get the antenna name (1st phi-sector called 1, not 0). More...

TChain *	getHeadChain (Int_t firstRun, Int_t lastRun, RawAnitaHeader *&headPtr)
	Get a TChain of the ANITA-3 header data. More...

TChain *	getAdu5PatChain (Int_t firstRun, Int_t lastRun, Adu5Pat *&pat)
	Get a TChain of the ANITA-3 adu5Pat data. More...

Detailed Description

My commonly used, general functions to manipulate ROOT objects; so I only ever write them once.

This lovingly curated namespace can be imported into CINT with gSystem->Load('libBensAnitaTools.so"). I find myself often writing little routines to modify things like TGraphs over and over again. Functions that do little jobs, too simple to deserve a dedicated class of their own go in this namespace. The idea that I only spend any time coding up a particular function once. Expect this namespace to be referenced a lot in my code.

Function Documentation

void RootTools::draw2D	(	TH2D *	hist,
		TString	opt
	)

Draw 2D histogram and set bin limits to be symmetrical about zero.

Parameters

hist	is the TH2D* to draw.
opt	is the draw option.

Definition at line 1301 of file RootTools.cxx.

TCanvas * RootTools::drawArrayOfHistosPrettily	(	TH1D *	hs[],
		Int_t	numHists,
		TCanvas *	can = `NULL`,
		Double_t *	colWeights = `NULL`
	)

Draws an array of histograms with a rainbow on a single TCanvas.

Parameters

hs	is a pointer to an array of pointers to the histograms.
numHists	is the number of histograms.
can	is the TCanvas to draw on, if one is not given a new one is created.
colWeights	is a pointer to a Double_t array, which will weight to colors drawn.

Returns: the TCanvas the histograms are drawn on.

Definition at line 730 of file RootTools.cxx.

TCanvas * RootTools::drawArrayOfTGraphsPrettily	(	TGraph *	grs[],
		Int_t	numGrs,
		TString	drawOpt = `"l"`,
		TCanvas *	can = `NULL`,
		Double_t *	colWeights = `NULL`
	)

Draws an array of TGraphs with a rainbow on a single TCanvas.

Parameters

grs	is a pointer to an array of pointers to the TGraphs.
numGrs	is the number of TGraphs.
can	is the TCanvas to draw on, if one is not given a new one is created.
drawOpt	is the draw option, select "p" for markers and "l" for lines.
colWeights	is a pointer to an array of doubles to be used as weights for colors.

Returns: the TCanvas the TGraphs are drawn on.

Definition at line 832 of file RootTools.cxx.

TCanvas * RootTools::drawHistsWithStatsBoxes	(	Int_t	numHists,
		TH1D *	hs[],
		TString	drawOpt,
		TString	statsOption
	)

Draw histograms on the same (new) canvas with nice stats boxes.

Parameters

numHists	is, as you might guess, the number of histograms (the lengths of the array hs[])
hs[]	is the array of pointers to TH1Ds to be plotted
drawOpt	is the draw option in ROOT, e.g. "e" for error bars.
statsOption	sets the stats to be displayed. I usually use "mre" for mean, RMS and entries.

Definition at line 1409 of file RootTools.cxx.

TChain * RootTools::getAdu5PatChain	(	Int_t	firstRun,
		Int_t	lastRun,
		Adu5Pat *&	pat
	)

Get a TChain of the ANITA-3 adu5Pat data.

Parameters

firstRun	is the first run.
lastRun	is the last run.
pat	a reference to a pointer to an Adu5Pat (yikes!).

Definition at line 1343 of file RootTools.cxx.

TString RootTools::getAntName	(	AnitaPol::AnitaPol_t	pol,
		Int_t	antInd
	)

Use polarization and index to get the antenna name (1st phi-sector called 1, not 0).

Parameters

pol	is the polarization
antInd	is the antenna index (counting from 0)

Definition at line 1365 of file RootTools.cxx.

Int_t RootTools::getBit	(	UInt_t	bitIndex,
		UInt_t	bitMask
	)

For decoding bit masks.

Parameters

bitIndex	is the bit to get (count from 0)
bitMask	is the bitMask

Definition at line 1242 of file RootTools.cxx.

Int_t RootTools::getColorFracThroughPalette	(	Int_t	index,
		Int_t	maxVal
	)

Gets the color a fraction through the current palette.

Parameters

index	is the numerator of the fraction
maxVal	is the denominator of the fraction

Definition at line 1391 of file RootTools.cxx.

Double_t RootTools::getDeltaAngleDeg	(	Double_t	angle1,
		Double_t	angle2
	)

Do angle1-angle2 (in degrees) and +- 360 such that the result lies in -180 < deltaAngle < 180.

Parameters

angle1	is the first angle
angle2	is the second angle

Returns: deltaAngle is the difference in the range -180 < deltaAngle < 180

If it looks like there's an insane angle being passed in will return -9999.

Definition at line 267 of file RootTools.cxx.

Double_t RootTools::getFullWidthHalfMax ( TH1D * h )

Assumes a nice distribution with a single peak, finds the full width half max.

Parameters

h	is a histogram

Returns: the full width half max

Definition at line 1102 of file RootTools.cxx.

TChain * RootTools::getHeadChain	(	Int_t	firstRun,
		Int_t	lastRun,
		RawAnitaHeader *&	headPtr
	)

Get a TChain of the ANITA-3 header data.

Parameters

firstRun	is the first run.
lastRun	is the last run.
headPtr	a reference to a pointer to a RawAnitaHeader (yikes!).

Definition at line 1322 of file RootTools.cxx.

Int_t RootTools::getIndexOfMaximum	(	Int_t	len,
		Double_t *	arr
	)

Find indices where input is not a number (for debugging).

Parameters

len	is the length of arr.
arr	is a pointer to an array of doubles of length len.

Returns: std::vector<Int_t> containing the indices of the TGraph where is value is not a number.

Definition at line 404 of file RootTools.cxx.

std::vector< Int_t > RootTools::getIndicesOfNans ( TGraph * gr )

Find indices where input is not a number (for debugging)

Parameters

gr	is the TGraph you want information about.

Returns: std::vector<Int_t> containing the indices of the TGraph where is value is not a number

Definition at line 432 of file RootTools.cxx.

void RootTools::getLocalMaxToMin	(	TGraph *	gr,
		Double_t &	maxY,
		Double_t &	maxX,
		Double_t &	minY,
		Double_t &	minX
	)

Updates input based on absolute largest local maximum to local minimum difference. For pulse finding.

Parameters

gr	is the TGraph you want information about.
maxY	is a reference to a Double_t, updated with the local maximum y-axis value of the TGraph.
maxX	is a reference to a Double_t, updated with the x-axis value at the maxY of the TGraph.
minY	is a reference to a Double_t, updated with the local minimum y-axis value of the TGraph.
minX	is a reference to a Double_t, updated with the x-axis value at the minY of the TGraph.

Definition at line 991 of file RootTools.cxx.

void RootTools::getLocalMaxToMinWithinLimits	(	TGraph *	gr,
		Double_t &	maxY,
		Double_t &	maxX,
		Double_t &	minY,
		Double_t &	minX,
		Double_t	lowerLimit,
		Double_t	upperLimit
	)

Updates input based on absolute largest local maximum to local minimum difference. For pulse finding.

Parameters

gr	is the TGraph you want information about.
maxY	is a reference to a Double_t, updated with the local maximum y-axis value of the TGraph.
maxX	is a reference to a Double_t, updated with the x-axis value at the maxY of the TGraph.
minY	is a reference to a Double_t, updated with the local minimum y-axis value of the TGraph.
minX	is a reference to a Double_t, updated with the x-axis value at the minY of the TGraph.
lowerLimit	is a Double_t containing the lower value of the x-axis to search from.
upperLimit	is a Double_t containing the upper value of the x-axis to search to.

Definition at line 1015 of file RootTools.cxx.

Double_t RootTools::getLowBinEdgeOfHistogramPeak ( TH1D * h )

Finds the bin containing the maximum value of a TH1D.

Parameters

h	is a histogram

Returns: the peak bin (in ROOT bin counting starts at 1)

Definition at line 1200 of file RootTools.cxx.

void RootTools::getMaxMin	(	TGraph *	gr,
		Double_t &	maxY,
		Double_t &	minY
	)

Scan long TGraph and update the references to the maximum and minimum input values.

Parameters

gr	is the TGraph you want information about.
maxY	is a reference to a Double_t, updated with the maximum y-axis value of the TGraph.
minY	is a reference to a Double_t, updated with the minimum y-axis value of the TGraph.

Definition at line 146 of file RootTools.cxx.

void RootTools::getMaxMin	(	TGraph *	gr,
		Double_t &	maxY,
		Double_t &	maxX,
		Double_t &	minY,
		Double_t &	minX
	)

Scan long TGraph and update the references to the maximum and minimum input values.

Parameters

gr	is the TGraph you want information about.
maxY	is a reference to a Double_t, updated with the maximum y-axis value of the TGraph.
maxX	is a reference to a Double_t, updated with the x-axis value at the maxY of the TGraph.
minY	is a reference to a Double_t, updated with the minimum y-axis value of the TGraph.
minX	is a reference to a Double_t, updated with the x-axis value at the minY of the TGraph.

Definition at line 165 of file RootTools.cxx.

void RootTools::getMaxMinWithinLimits	(	TGraph *	gr,
		Double_t &	maxY,
		Double_t &	maxX,
		Double_t &	minY,
		Double_t &	minX,
		Double_t	lowerLimit,
		Double_t	upperLimit
	)

Scan long TGraph and update the references to the maximum and minimum input values.

Parameters

gr	is the TGraph you want information about.
maxY	is a reference to a Double_t, updated with the maximum y-axis value of the TGraph.
maxX	is a reference to a Double_t, updated with the x-axis value at the maxY of the TGraph.
minY	is a reference to a Double_t, updated with the minimum y-axis value of the TGraph.
minX	is a reference to a Double_t, updated with the x-axis value at the minY of the TGraph.
lowerLimit	is a Double_t containing the lower value of the x-axis to search from.
upperLimit	is a Double_t containing the upper value of the x-axis to search to.

Definition at line 201 of file RootTools.cxx.

void RootTools::getMeanAndRms	(	TGraph *	gr,
		Double_t &	mean,
		Double_t &	rms
	)

Get mean and rms of gr.

Parameters

gr	is the TGraph you want information about.
mean	is a reference to a Double_t, updated with the mean value of gr before modification.
rms	is a reference to a Double_t, updated with the rms value of gr before modification.

Definition at line 381 of file RootTools.cxx.

Int_t RootTools::getNumBitsSet	(	Int_t	numBitsToCheck,
		UInt_t	bitMask
	)

For counting how many bits are set to one in a bitmask.

Parameters

numBitsToCheck	is the number of little endian bits to check.
bitMask	is the object to check the bits of.

Definition at line 1257 of file RootTools.cxx.

Int_t RootTools::getPeakBinOfHistogram ( TH1D * h )

Finds the bin containing the maximum value of a TH1D.

Parameters

h	is a histogram

Returns: the peak bin (in ROOT bin counting starts at 1)

Definition at line 1141 of file RootTools.cxx.

Double_t RootTools::getPeakBinOfHistogram	(	TH2D *	hist,
		Int_t &	binx,
		Int_t &	biny
	)

Finds the bin containing the maximum value of a TH2D.

Parameters

hist	is a histogram
binx	is a reference to the x-axis bin number (in ROOT bin counting starts at 1)
biny	is a reference to the y-axis bin number (in ROOT bin counting starts at 1)

Returns: the value of the histogram peak bin

Definition at line 1169 of file RootTools.cxx.

Double_t RootTools::getSumOfYVals ( TGraph * gr )

Adds up all y-axis values of input TGraph.

Parameters

gr	is the TGraph you want to sum the y-axis values of.

Returns: sum is a Double_t.

Definition at line 14 of file RootTools.cxx.

TGraph * RootTools::interpolateWithStartTime	(	TGraph *	grIn,
		Double_t	startTime,
		Double_t	dt,
		Int_t	nSamp
	)

Wrapper function for ROOT's interpolator, can zero pad the front to start from a particular time.

Parameters

grIn	points to the TGraph containing the waveform to interpolate
startTime	is the start time for interpolation: zero pads if this is earlier than the TGraph start time.
dt	is the time between samples
nSamp	is the time number of samples

Definition at line 679 of file RootTools.cxx.

TGraph * RootTools::makeDerivativeTGraph ( TGraph * gr )

Makes a derivative TGraph, contains gr->GetN() - 1 points.

Parameters

gr	is the TGraph from which to make the derivative

Returns: Pointer to TGraph containing derivative of input gr.

Definition at line 92 of file RootTools.cxx.

TLegend * RootTools::makeLegend	(	TGraph *	grs[],
		Int_t	numGrs,
		TString	titles[],
		TString	opt = `"l"`,
		Double_t	minX = `0.8`,
		Double_t	minY = `0.8`,
		Double_t	maxX = `1`,
		Double_t	maxY = `1`
	)

Generates a TLegend from input arrays of TGraphs and titles (TStrings)

Parameters

grs	is a pointer to an array of pointers to the TGraphs.
numGrs	is the number of TGraphs.
titles	is an array of TStrings containing the titles
opt	is the legend option ("l" by default)
minX	is the Pad coordinates, 0.8 by default.
minY	is the Pad coordinates, 0.8 by default.
maxX	is the Pad coordinates, 1 by default.
maxY	is the Pad coordinates, 1 by default.

Returns: the newly generated TLegend

Definition at line 913 of file RootTools.cxx.

TLegend * RootTools::makeLegend	(	TH1D *	hs[],
		Int_t	numHists,
		TString	titles[],
		TString	opt = `"l"`,
		Double_t	minX = `0.8`,
		Double_t	minY = `0.8`,
		Double_t	maxX = `1`,
		Double_t	maxY = `1`
	)

Generates a TLegend from input arrays of TGraphs and titles (TStrings).

Parameters

hs	is a pointer to an array of pointers to the histograms (TH1Ds).
numHists	is the number of histgorams in the array hs.
titles	is an array of TStrings containing the titles
opt	is the legend option ("l" by default)
minX	is the Pad coordinates, 0.8 by default.
minY	is the Pad coordinates, 0.8 by default.
maxX	is the Pad coordinates, 1 by default.
maxY	is the Pad coordinates, 1 by default.

Returns: the newly generated TLegend

Definition at line 945 of file RootTools.cxx.

TGraph * RootTools::makeLinearlyInterpolatedGraph	(	TGraph *	grIn,
		Double_t	dt
	)

Make interpolated TGraph using linear interpolation between points.

Parameters

grIn	is the TGraph you want to interpolate.
dt	is the time (in x-axis units of grIn) between points in grOut.

Returns: grOut, a new TGraph.

Definition at line 600 of file RootTools.cxx.

TGraph * RootTools::makeNormalized ( TGraph * gr )

Creates new TGraph (leaving original unchanged) with mean = 0 & RMS = 1.

Create normalized copy of gr, where mean=0 and rms=1 (input unmodified).

Parameters

gr	is the TGraph you want to manipulate.

Definition at line 343 of file RootTools.cxx.

TGraph * RootTools::makeNormalized	(	TGraph *	gr,
		Double_t &	mean,
		Double_t &	rms
	)

Create normalized copy of gr, where mean=0 and rms=1 (input unmodified).

Parameters

gr	is the TGraph you want to manipulate.
mean	is a reference to a Double_t, updated with the mean value of gr.
rms	is a reference to a Double_t, updated with the rms value of gr.

Definition at line 362 of file RootTools.cxx.

TGraph * RootTools::makeSortedTGraph	(	TTree *	tree,
		TString	drawText,
		TString	cutString,
		Double_t	wrapValue
	)

Plot a time (or any TTree branch) ordered TGraph of some TTree branch.

Parameters

tree	is a pointer to a TTree containing the variables to be plotted.
drawText	is passed to TTree->Draw() in order to plot the data points (e.g. "eventNumber:heading") for a plot of heading as a function of event number.
cutString	is passed to TTree->Draw() for selection (e.g. "eventNumber > 30000000")
wrapValue	e.g. with wrapValue=360, if neighbouring points go 359->1 degrees, then draw them as 359->361. i.e. remove discontinuities.

Definition at line 490 of file RootTools.cxx.

TGraph * RootTools::makeUnwrappedCorrelationGraph ( TGraph * gr )

Unwraps a circularly correlated graph so the -ve time lies behind the +ve time.

Parameters

gr	is the wrapped correlation graph.

Returns: Pointer to TGraph containing unwrapped correlation graph.

Definition at line 115 of file RootTools.cxx.

void RootTools::makeZaxisScaleEqualAboutZero ( TH2D * h )

For nice plotting of 2D dists about 0, makes max = -min.

Parameters

h	is a 2D histogram

Definition at line 1218 of file RootTools.cxx.

void RootTools::multiplyTGraphYAxes	(	Int_t	numGrs,
		TGraph *	grs[],
		Double_t	factors[]
	)

Multiples a set of factors to the y-axis values of each respective TGraph.

Parameters

numGrs	is the length of both arrays.
grs	is an array of pointers to TGraphs.
factors	an array of Double_ts to add to each x-axis point of the respective TGraph.

Assumes that both grs and factors point to arrays of length numGrs

Definition at line 809 of file RootTools.cxx.

void RootTools::normalize	(	TGraph *	gr,
		Double_t &	mean,
		Double_t &	rms
	)

Modify gr to set mean=0 and rms=1.

Parameters

gr	is the TGraph you want to manipulate.
mean	is a reference to a Double_t, updated with the mean value of gr before modification.
rms	is a reference to a Double_t, updated with the rms value of gr before modification.

Definition at line 323 of file RootTools.cxx.

void RootTools::normalize ( TGraph * gr )

Modify gr to set mean=0 and rms=1.

Parameters

gr	is the TGraph you want to manipulate.

Definition at line 306 of file RootTools.cxx.

void RootTools::offsetTGraphXAxes	(	Int_t	numGrs,
		TGraph *	grs[],
		Double_t	offsets[]
	)

Adds a set of offsets to the x-axis values of each respective TGraph.

Parameters

numGrs	is the length of both arrays.
grs	is a vector of pointers to TGraphs.
offsets	a vector of Double_ts to add to each x-axis point of the respective TGraph.

Assumes that both grs and offsets point to arrays of length numGrs

Definition at line 787 of file RootTools.cxx.

TH1D * RootTools::plotsZaxisDist	(	TH2 *	h2,
		TString	hName,
		Int_t	nBins,
		Double_t	xMin,
		Double_t	xMax
	)

Put Z-axis values of a TH2D histogram into a TH1D histogram.

Parameters

h2	is a pointer to the TH2D you want to examine.
hName	is a the name of the new histogram.
nBins	is the number of bins for the new histogram.
xMin	is the x-axis minimum for the new histogram.
xMax	is the x-axis maximum for the new histogram.

Definition at line 553 of file RootTools.cxx.

void RootTools::printArray	(	int	n,
		double *	array,
		TString	delimiter = `", "`,
		TString	start = `"{"`,
		TString	end = `"}\n"`
	)

Print all the elements of a c-styles array to the screen for debugging.

Parameters

n	is the length of the array.
array	is the first element of the array.
delimiter	is for decoration, ", " by default, change as you please.
start	is for decoration, "{" by default, change as you please.
end	is for decoration, "}\n" by default, change as you please.

Definition at line 36 of file RootTools.cxx.

void RootTools::printTGraphInfo ( TGraph * gr )

Print summary information about gr: name, title, number of points, all x and y values.

Parameters

gr	is the TGraph you want information about.

Definition at line 452 of file RootTools.cxx.

void RootTools::printXVals	(	TGraph *	gr,
		TString	delimiter = `", "`,
		TString	start = `"{"`,
		TString	end = `"}\n"`
	)

Print all the the x-axis values of a TGraph to the screen for debugging.

Parameters

gr	is the TGraph you want information about.
delimiter	is for decoration, ", " by default, change as you please.
start	is for decoration, "{" by default, change as you please.
end	is for decoration, "}\n" by default, change as you please.

See also: RootTools::printArray(int n, double* array, TString delimiter, TString start ,TString end)

Definition at line 77 of file RootTools.cxx.

void RootTools::printYVals	(	TGraph *	gr,
		TString	delimiter = `", "`,
		TString	start = `"{"`,
		TString	end = `"}\n"`
	)

Print all the the y-axis values of a TGraph to the screen for debugging.

Parameters

gr	is the TGraph you want information about.
delimiter	is for decoration, ", " by default, change as you please.
start	is for decoration, "{" by default, change as you please.
end	is for decoration, "}\n" by default, change as you please.

See also: RootTools::printArray(int n, double* array, TString delimiter, TString start ,TString end)

Definition at line 59 of file RootTools.cxx.

void RootTools::saveCanvas	(	TCanvas *	c,
		TString	fileName
	)

My function to save a TCanvas for talks, and save an editable version.

Parameters

c	is a pointer to the TCanvas
fileName	is the file name. Note that suffixes are added in the function!

Definition at line 1078 of file RootTools.cxx.

void RootTools::setWhiteZeroColorScale ( )

Set color scale where white is in the middle.

You need to draw things with RootTools::draw2D(TH2D* hist, TString opt);

Definition at line 1277 of file RootTools.cxx.

void RootTools::subtractOffset	(	TGraph *	gr,
		Double_t	offset
	)

Subtract a constant value from the y-axis values at each point.

Parameters

gr	is the TGraph you want to manipulate.
offset	is the value to subtract from each point.

Definition at line 247 of file RootTools.cxx.

void RootTools::writeTGraph	(	TGraph *	gr,
		TString	name
	)

Sets the name of a TGraph to name and then writes it to the current file.

Parameters

gr	is a pointer to the TGraph you want to save.
name	is the name you want to give the TGraph before saving it.

Definition at line 970 of file RootTools.cxx.

void RootTools::zeroPadTGraph	(	TGraph *	gr,
		Int_t	newLen,
		Double_t	dt = `0`
	)

Add a bunch of zeros to the end of a TGraph.

Parameters

gr	is the TGraph you want to pad.
newLen	is the desired length of gr.
dt

Definition at line 576 of file RootTools.cxx.