2-D histogram with a double per channel (see TH1 documentation)}

Definition at line 292 of file TH2.h.

Public Member Functions
	TH2D ()
	Constructor.

	TH2D (const char name, const char title, Int_t nbinsx, const Double_t xbins, Int_t nbinsy, const Double_t ybins)
	Constructor (see TH2::TH2 for explanation of parameters)

	TH2D (const char name, const char title, Int_t nbinsx, const Double_t *xbins, Int_t nbinsy, Double_t ylow, Double_t yup)
	Constructor (see TH2::TH2 for explanation of parameters)

	TH2D (const char name, const char title, Int_t nbinsx, const Float_t xbins, Int_t nbinsy, const Float_t ybins)
	Constructor (see TH2::TH2 for explanation of parameters)

	TH2D (const char name, const char title, Int_t nbinsx, Double_t xlow, Double_t xup, Int_t nbinsy, const Double_t *ybins)
	Constructor (see TH2::TH2 for explanation of parameters)

	TH2D (const char name, const char title, Int_t nbinsx, Double_t xlow, Double_t xup, Int_t nbinsy, Double_t ylow, Double_t yup)
	Constructor (see TH2::TH2 for explanation of parameters)

	TH2D (const TH2D &h2d)
	Copy constructor.

	TH2D (const TMatrixDBase &m)
	Constructor Construct a 2-D histogram from a TMatrixDBase.

virtual	~TH2D ()
	Destructor.

virtual void	AddBinContent (Int_t bin)
	Increment bin content by 1.

virtual void	AddBinContent (Int_t bin, Double_t w)
	Increment bin content by a weight w.

virtual void	Copy (TObject &hnew) const
	Copy.

TH2D &	operator= (const TH2D &h1)
	Operator =.

virtual void	Reset (Option_t *option="")
	Reset this histogram: contents, errors, etc.

virtual void	SetBinsLength (Int_t n=-1)
	Set total number of bins including under/overflow Reallocate bin contents array.

Public Member Functions inherited from TH2
virtual	~TH2 ()
	Destructor.

virtual Int_t	BufferEmpty (Int_t action=0)
	Fill histogram with all entries in the buffer.

virtual Int_t	Fill (const char namex, const char namey, Double_t w)
	Increment cell defined by namex,namey by a weight w.

virtual Int_t	Fill (const char *namex, Double_t y, Double_t w)
	Increment cell defined by namex,y by a weight w.

virtual Int_t	Fill (Double_t x, const char *namey, Double_t w)
	Increment cell defined by x,namey by a weight w.

virtual Int_t	Fill (Double_t x, Double_t y)
	Increment cell defined by x,y by 1.

virtual Int_t	Fill (Double_t x, Double_t y, Double_t w)
	Increment cell defined by x,y by a weight w.

virtual void	FillN (Int_t ntimes, const Double_t x, const Double_t y, const Double_t *w, Int_t stride=1)
	Fill a 2-D histogram with an array of values and weights.

virtual void	FillN (Int_t, const Double_t , const Double_t , Int_t)
	Fill this histogram with an array x and weights w.

virtual void	FillRandom (const char fname, Int_t ntimes=5000, TRandom rng=nullptr)
	Fill histogram following distribution in function fname.

virtual void	FillRandom (TH1 h, Int_t ntimes=5000, TRandom rng=nullptr)
	Fill histogram following distribution in histogram h.

virtual void	FitSlicesX (TF1 f1=0, Int_t firstybin=0, Int_t lastybin=-1, Int_t cut=0, Option_t option="QNR", TObjArray *arr=0)
	Project slices along X in case of a 2-D histogram, then fit each slice with function f1 and make a histogram for each fit parameter Only bins along Y between firstybin and lastybin are considered.

virtual void	FitSlicesY (TF1 f1=0, Int_t firstxbin=0, Int_t lastxbin=-1, Int_t cut=0, Option_t option="QNR", TObjArray *arr=0)
	Project slices along Y in case of a 2-D histogram, then fit each slice with function f1 and make a histogram for each fit parameter Only bins along X between firstxbin and lastxbin are considered.

virtual Int_t	GetBin (Int_t binx, Int_t biny, Int_t binz=0) const
	Return Global bin number corresponding to binx,y,z.

virtual Double_t	GetBinContent (Int_t bin) const
	Return content of bin number bin.

virtual Double_t	GetBinContent (Int_t binx, Int_t biny) const

virtual Double_t	GetBinContent (Int_t binx, Int_t biny, Int_t) const

virtual Double_t	GetBinErrorLow (Int_t bin) const
	Return lower error associated to bin number bin.

virtual Double_t	GetBinErrorLow (Int_t binx, Int_t biny)

virtual Double_t	GetBinErrorUp (Int_t bin) const
	Return upper error associated to bin number bin.

virtual Double_t	GetBinErrorUp (Int_t binx, Int_t biny)

virtual Double_t	GetBinWithContent2 (Double_t c, Int_t &binx, Int_t &biny, Int_t firstxbin=1, Int_t lastxbin=-1, Int_t firstybin=1, Int_t lastybin=-1, Double_t maxdiff=0) const
	compute first cell (binx,biny) in the range [firstxbin,lastxbin][firstybin,lastybin] for which diff = abs(cell_content-c) <= maxdiff In case several cells in the specified range with diff=0 are found the first cell found is returned in binx,biny.

virtual Double_t	GetCorrelationFactor (Int_t axis1=1, Int_t axis2=2) const
	Return correlation factor between axis1 and axis2.

virtual Double_t	GetCovariance (Int_t axis1=1, Int_t axis2=2) const
	Return covariance between axis1 and axis2.

virtual void	GetRandom2 (Double_t &x, Double_t &y, TRandom *rng=nullptr)
	Return 2 random numbers along axis x and y distributed according to the cell-contents of this 2-D histogram return a NaN if the histogram has a bin with negative content.

virtual void	GetStats (Double_t *stats) const
	Fill the array stats from the contents of this histogram The array stats must be correctly dimensioned in the calling program.

virtual Double_t	Integral (Int_t binx1, Int_t binx2, Int_t biny1, Int_t biny2, Option_t *option="") const
	Return integral of bin contents in range [firstxbin,lastxbin],[firstybin,lastybin] for a 2-D histogram By default the integral is computed as the sum of bin contents in the range.

virtual Double_t	Integral (Int_t, Int_t, Int_t, Int_t, Int_t, Int_t, Option_t *="") const

virtual Double_t	Integral (Option_t *option="") const
	Return integral of bin contents.

virtual Double_t	IntegralAndError (Int_t binx1, Int_t binx2, Int_t biny1, Int_t biny2, Double_t &err, Option_t *option="") const
	Return integral of bin contents in range [firstxbin,lastxbin],[firstybin,lastybin] for a 2-D histogram.

virtual Double_t	Interpolate (Double_t x, Double_t y) const
	Given a point P(x,y), Interpolate approximates the value via bilinear interpolation based on the four nearest bin centers see Wikipedia, Bilinear Interpolation Andy Mastbaum 10/8/2008 vaguely based on R.Raja 6-Sep-2008.

virtual Double_t	Interpolate (Double_t x, Double_t y, Double_t z) const
	illegal for a TH2

virtual Double_t	KolmogorovTest (const TH1 h2, Option_t option="") const
	Statistical test of compatibility in shape between THIS histogram and h2, using Kolmogorov test.

TProfile *	ProfileX (const char name="_pfx", Int_t firstybin=1, Int_t lastybin=-1, Option_t option="") const
	Project a 2-D histogram into a profile histogram along X.

TProfile *	ProfileY (const char name="_pfy", Int_t firstxbin=1, Int_t lastxbin=-1, Option_t option="") const
	Project a 2-D histogram into a profile histogram along Y.

TH1D *	ProjectionX (const char name="_px", Int_t firstybin=0, Int_t lastybin=-1, Option_t option="") const
	Project a 2-D histogram into a 1-D histogram along X.

TH1D *	ProjectionY (const char name="_py", Int_t firstxbin=0, Int_t lastxbin=-1, Option_t option="") const
	Project a 2-D histogram into a 1-D histogram along Y.

virtual void	PutStats (Double_t *stats)
	Replace current statistics with the values in array stats.

TH1D *	QuantilesX (Double_t prob=0.5, const char *name="_qx") const
	Compute the X distribution of quantiles in the other variable Y name is the name of the returned histogram prob is the probability content for the quantile (0.5 is the default for the median) An approximate error for the quantile is computed assuming that the distribution in the other variable is normal.

TH1D *	QuantilesY (Double_t prob=0.5, const char *name="_qy") const
	Compute the Y distribution of quantiles in the other variable X name is the name of the returned histogram prob is the probability content for the quantile (0.5 is the default for the median) An approximate error for the quantile is computed assuming that the distribution in the other variable is normal.

virtual TH2 *	Rebin (Int_t ngroup=2, const char newname="", const Double_t xbins=0)
	Override TH1::Rebin as TH2::RebinX Rebinning in variable binning as for TH1 is not allowed If a non-null pointer is given an error is flagged see RebinX and Rebin2D.

virtual TH2 *	Rebin2D (Int_t nxgroup=2, Int_t nygroup=2, const char *newname="")
	Rebin this histogram grouping nxgroup/nygroup bins along the xaxis/yaxis together.

virtual TH2 *	RebinX (Int_t ngroup=2, const char *newname="")
	Rebin only the X axis see Rebin2D.

virtual TH2 *	RebinY (Int_t ngroup=2, const char *newname="")
	Rebin only the Y axis see Rebin2D.

virtual void	SetBinContent (Int_t bin, Double_t content)
	Set bin content.

virtual void	SetBinContent (Int_t binx, Int_t biny, Double_t content)

virtual void	SetBinContent (Int_t binx, Int_t biny, Int_t, Double_t content)

virtual void	SetShowProjectionX (Int_t nbins=1)
	When the mouse is moved in a pad containing a 2-d view of this histogram a second canvas shows the projection along X corresponding to the mouse position along Y.

virtual void	SetShowProjectionY (Int_t nbins=1)
	When the mouse is moved in a pad containing a 2-d view of this histogram a second canvas shows the projection along Y corresponding to the mouse position along X.

virtual TH1 *	ShowBackground (Int_t niter=20, Option_t *option="same")
	This function calculates the background spectrum in this histogram.

virtual Int_t	ShowPeaks (Double_t sigma=2, Option_t *option="", Double_t threshold=0.05)
	Interface to TSpectrum2::Search the function finds peaks in this histogram where the width is > sigma and the peak maximum greater than threshold*maximum bin content of this.

virtual void	Smooth (Int_t ntimes=1, Option_t *option="")
	Smooth bin contents of this 2-d histogram using kernel algorithms similar to the ones used in the raster graphics community.

Public Member Functions inherited from TH1
virtual	~TH1 ()
	Histogram default destructor.

virtual Bool_t	Add (const TH1 h, const TH1 h2, Double_t c1=1, Double_t c2=1)
	Replace contents of this histogram by the addition of h1 and h2.

virtual Bool_t	Add (const TH1 *h1, Double_t c1=1)
	Performs the operation: `this = this + c1*h1` If errors are defined (see TH1::Sumw2), errors are also recalculated.

virtual Bool_t	Add (TF1 h1, Double_t c1=1, Option_t option="")
	Performs the operation: `this = this + c1*f1` if errors are defined (see TH1::Sumw2), errors are also recalculated.

virtual Double_t	AndersonDarlingTest (const TH1 *h2, Double_t &advalue) const
	Same function as above but returning also the test statistic value.

virtual Double_t	AndersonDarlingTest (const TH1 h2, Option_t option="") const
	Statistical test of compatibility in shape between this histogram and h2, using the Anderson-Darling 2 sample test.

virtual void	Browse (TBrowser *b)
	Browse the Histogram object.

virtual Bool_t	CanExtendAllAxes () const
	Returns true if all axes are extendable.

virtual Double_t	Chi2Test (const TH1 h2, Option_t option="UU", Double_t *res=0) const
	\( \chi^{2} \) test for comparing weighted and unweighted histograms

virtual Double_t	Chi2TestX (const TH1 h2, Double_t &chi2, Int_t &ndf, Int_t &igood, Option_t option="UU", Double_t *res=0) const
	The computation routine of the Chisquare test.

virtual Double_t	Chisquare (TF1 f1, Option_t option="") const
	Compute and return the chisquare of this histogram with respect to a function The chisquare is computed by weighting each histogram point by the bin error By default the full range of the histogram is used.

virtual void	ClearUnderflowAndOverflow ()
	Remove all the content from the underflow and overflow bins, without changing the number of entries After calling this method, every undeflow and overflow bins will have content 0.0 The Sumw2 is also cleared, since there is no more content in the bins.

TObject *	Clone (const char *newname=0) const
	Make a complete copy of the underlying object.

virtual Double_t	ComputeIntegral (Bool_t onlyPositive=false)
	Compute integral (cumulative sum of bins) The result stored in fIntegral is used by the GetRandom functions.

virtual void	DirectoryAutoAdd (TDirectory *)
	Perform the automatic addition of the histogram to the given directory.

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Compute distance from point px,py to a line.

virtual Bool_t	Divide (const TH1 *h1)
	Divide this histogram by h1.

virtual Bool_t	Divide (const TH1 h1, const TH1 h2, Double_t c1=1, Double_t c2=1, Option_t *option="")
	Replace contents of this histogram by the division of h1 by h2.

virtual Bool_t	Divide (TF1 *f1, Double_t c1=1)
	Performs the operation: `this = this/(c1*f1)` if errors are defined (see TH1::Sumw2), errors are also recalculated.

virtual void	Draw (Option_t *option="")
	Draw this histogram with options.

virtual TH1 *	DrawCopy (Option_t option="", const char name_postfix="_copy") const
	Copy this histogram and Draw in the current pad.

virtual TH1 *	DrawNormalized (Option_t *option="", Double_t norm=1) const
	Draw a normalized copy of this histogram.

virtual void	DrawPanel ()
	Display a panel with all histogram drawing options.

virtual void	Eval (TF1 f1, Option_t option="")
	Evaluate function f1 at the center of bins of this histogram.

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to one event.

virtual void	ExtendAxis (Double_t x, TAxis *axis)
	Histogram is resized along axis such that x is in the axis range.

virtual TH1 *	FFT (TH1 h_output, Option_t option)
	This function allows to do discrete Fourier transforms of TH1 and TH2.

virtual Int_t	FindBin (Double_t x, Double_t y=0, Double_t z=0)
	Return Global bin number corresponding to x,y,z.

virtual Int_t	FindFirstBinAbove (Double_t threshold=0, Int_t axis=1, Int_t firstBin=1, Int_t lastBin=-1) const
	Find first bin with content > threshold for axis (1=x, 2=y, 3=z) if no bins with content > threshold is found the function returns -1.

virtual Int_t	FindFixBin (Double_t x, Double_t y=0, Double_t z=0) const
	Return Global bin number corresponding to x,y,z.

virtual Int_t	FindLastBinAbove (Double_t threshold=0, Int_t axis=1, Int_t firstBin=1, Int_t lastBin=-1) const
	Find last bin with content > threshold for axis (1=x, 2=y, 3=z) if no bins with content > threshold is found the function returns -1.

virtual TObject *	FindObject (const char *name) const
	Search object named name in the list of functions.

virtual TObject *	FindObject (const TObject *obj) const
	Search object obj in the list of functions.

virtual TFitResultPtr	Fit (const char formula, Option_t option="", Option_t *goption="", Double_t xmin=0, Double_t xmax=0)
	Fit histogram with function fname.

virtual TFitResultPtr	Fit (TF1 f1, Option_t option="", Option_t *goption="", Double_t xmin=0, Double_t xmax=0)
	Fit histogram with function f1.

virtual void	FitPanel ()
	Display a panel with all histogram fit options.

TH1 *	GetAsymmetry (TH1 *h2, Double_t c2=1, Double_t dc2=0)
	Return a histogram containing the asymmetry of this histogram with h2, where the asymmetry is defined as:

virtual Color_t	GetAxisColor (Option_t *axis="X") const
	Return the number of divisions for "axis".

virtual Float_t	GetBarOffset () const

virtual Float_t	GetBarWidth () const

virtual Double_t	GetBinCenter (Int_t bin) const
	Return bin center for 1D histogram.

virtual Double_t	GetBinError (Int_t bin) const
	Return value of error associated to bin number bin.

virtual Double_t	GetBinError (Int_t binx, Int_t biny) const

virtual Double_t	GetBinError (Int_t binx, Int_t biny, Int_t binz) const

virtual EBinErrorOpt	GetBinErrorOption () const

virtual Double_t	GetBinLowEdge (Int_t bin) const
	Return bin lower edge for 1D histogram.

virtual Double_t	GetBinWidth (Int_t bin) const
	Return bin width for 1D histogram.

virtual Double_t	GetBinWithContent (Double_t c, Int_t &binx, Int_t firstx=0, Int_t lastx=0, Double_t maxdiff=0) const
	Compute first binx in the range [firstx,lastx] for which diff = abs(bin_content-c) <= maxdiff.

virtual void	GetBinXYZ (Int_t binglobal, Int_t &binx, Int_t &biny, Int_t &binz) const
	Return binx, biny, binz corresponding to the global bin number globalbin see TH1::GetBin function above.

const Double_t *	GetBuffer () const

Int_t	GetBufferLength () const

Int_t	GetBufferSize () const

virtual Double_t	GetCellContent (Int_t binx, Int_t biny) const

virtual Double_t	GetCellError (Int_t binx, Int_t biny) const

virtual void	GetCenter (Double_t *center) const
	Fill array with center of bins for 1D histogram Better to use h1.GetXaxis()->GetCenter(center)

virtual Int_t	GetContour (Double_t *levels=0)
	Return contour values into array levels if pointer levels is non zero.

virtual Double_t	GetContourLevel (Int_t level) const
	Return value of contour number level.

virtual Double_t	GetContourLevelPad (Int_t level) const
	Return the value of contour number "level" in Pad coordinates.

TH1 *	GetCumulative (Bool_t forward=kTRUE, const char *suffix="_cumulative") const
	Return a pointer to a histogram containing the cumulative content.

virtual Int_t	GetDimension () const

TDirectory *	GetDirectory () const

virtual Double_t	GetEffectiveEntries () const
	Number of effective entries of the histogram.

virtual Double_t	GetEntries () const
	Return the current number of entries.

virtual TF1 *	GetFunction (const char *name) const
	Return pointer to function with name.

virtual Double_t *	GetIntegral ()
	Return a pointer to the array of bins integral.

virtual Double_t	GetKurtosis (Int_t axis=1) const

virtual Color_t	GetLabelColor (Option_t *axis="X") const
	Return the "axis" label color.

virtual Style_t	GetLabelFont (Option_t *axis="X") const
	Return the "axis" label font.

virtual Float_t	GetLabelOffset (Option_t *axis="X") const
	Return the "axis" label offset.

virtual Float_t	GetLabelSize (Option_t *axis="X") const
	Return the "axis" label size.

TList *	GetListOfFunctions () const

virtual void	GetLowEdge (Double_t *edge) const
	Fill array with low edge of bins for 1D histogram Better to use h1.GetXaxis()->GetLowEdge(edge)

virtual Double_t	GetMaximum (Double_t maxval=FLT_MAX) const
	Return maximum value smaller than maxval of bins in the range, unless the value has been overridden by TH1::SetMaximum, in which case it returns that value.

virtual Int_t	GetMaximumBin () const
	Return location of bin with maximum value in the range.

virtual Int_t	GetMaximumBin (Int_t &locmax, Int_t &locmay, Int_t &locmaz) const
	Return location of bin with maximum value in the range.

virtual Double_t	GetMaximumStored () const

virtual Double_t	GetMean (Int_t axis=1) const
	For axis = 1,2 or 3 returns the mean value of the histogram along X,Y or Z axis.

virtual Double_t	GetMeanError (Int_t axis=1) const
	Return standard error of mean of this histogram along the X axis.

virtual Double_t	GetMinimum (Double_t minval=-FLT_MAX) const
	Return minimum value larger than minval of bins in the range, unless the value has been overridden by TH1::SetMinimum, in which case it returns that value.

virtual void	GetMinimumAndMaximum (Double_t &min, Double_t &max) const
	Retrieve the minimum and maximum values in the histogram.

virtual Int_t	GetMinimumBin () const
	Return location of bin with minimum value in the range.

virtual Int_t	GetMinimumBin (Int_t &locmix, Int_t &locmiy, Int_t &locmiz) const
	Return location of bin with minimum value in the range.

virtual Double_t	GetMinimumStored () const

virtual Int_t	GetNbinsX () const

virtual Int_t	GetNbinsY () const

virtual Int_t	GetNbinsZ () const

virtual Int_t	GetNcells () const

virtual Int_t	GetNdivisions (Option_t *axis="X") const
	Return the number of divisions for "axis".

virtual Double_t	GetNormFactor () const

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Redefines TObject::GetObjectInfo.

Option_t *	GetOption () const

TVirtualHistPainter *	GetPainter (Option_t *option="")
	Return pointer to painter.

virtual Int_t	GetQuantiles (Int_t nprobSum, Double_t q, const Double_t probSum=0)
	Compute Quantiles for this histogram Quantile x_q of a probability distribution Function F is defined as.

virtual Double_t	GetRandom (TRandom *rng=nullptr) const
	Return a random number distributed according the histogram bin contents.

Double_t	GetRMS (Int_t axis=1) const

Double_t	GetRMSError (Int_t axis=1) const

virtual Double_t	GetSkewness (Int_t axis=1) const

EStatOverflows	GetStatOverflows () const

virtual Double_t	GetStdDev (Int_t axis=1) const
	Returns the Standard Deviation (Sigma).

virtual Double_t	GetStdDevError (Int_t axis=1) const
	Return error of standard deviation estimation for Normal distribution.

virtual Double_t	GetSumOfWeights () const
	Return the sum of weights excluding under/overflows.

virtual TArrayD *	GetSumw2 ()

virtual const TArrayD *	GetSumw2 () const

virtual Int_t	GetSumw2N () const

virtual Float_t	GetTickLength (Option_t *axis="X") const
	Return the "axis" tick length.

virtual Style_t	GetTitleFont (Option_t *axis="X") const
	Return the "axis" title font.

virtual Float_t	GetTitleOffset (Option_t *axis="X") const
	Return the "axis" title offset.

virtual Float_t	GetTitleSize (Option_t *axis="X") const
	Return the "axis" title size.

TAxis *	GetXaxis ()
	Get the behaviour adopted by the object about the statoverflows. See EStatOverflows for more information.

const TAxis *	GetXaxis () const

TAxis *	GetYaxis ()

const TAxis *	GetYaxis () const

TAxis *	GetZaxis ()

const TAxis *	GetZaxis () const

Bool_t	IsBinOverflow (Int_t bin, Int_t axis=0) const
	Return true if the bin is overflow.

Bool_t	IsBinUnderflow (Int_t bin, Int_t axis=0) const
	Return true if the bin is underflow.

virtual Bool_t	IsHighlight () const

virtual void	LabelsDeflate (Option_t *axis="X")
	Reduce the number of bins for the axis passed in the option to the number of bins having a label.

virtual void	LabelsInflate (Option_t *axis="X")
	Double the number of bins for axis.

virtual void	LabelsOption (Option_t option="h", Option_t axis="X")
	Sort bins with labels or set option(s) to draw axis with labels.

virtual Long64_t	Merge (TCollection *list)

Long64_t	Merge (TCollection list, Option_t option)
	Add all histograms in the collection to this histogram.

virtual Bool_t	Multiply (const TH1 *h1)
	Multiply this histogram by h1.

virtual Bool_t	Multiply (const TH1 h1, const TH1 h2, Double_t c1=1, Double_t c2=1, Option_t *option="")
	Replace contents of this histogram by multiplication of h1 by h2.

virtual Bool_t	Multiply (TF1 *f1, Double_t c1=1)
	Performs the operation:

virtual void	Paint (Option_t *option="")
	Control routine to paint any kind of histograms.

virtual void	Print (Option_t *option="") const
	Print some global quantities for this histogram.

virtual void	RebinAxis (Double_t x, TAxis *axis)

virtual void	Rebuild (Option_t *option="")
	Using the current bin info, recompute the arrays for contents and errors.

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove object from the list of functions.

virtual void	ResetStats ()
	Reset the statistics including the number of entries and replace with values calculated from bin content.

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save primitive as a C++ statement(s) on output stream out.

virtual void	Scale (Double_t c1=1, Option_t *option="")
	Multiply this histogram by a constant c1.

virtual void	SetAxisColor (Color_t color=1, Option_t *axis="X")
	Set color to draw the axis line and tick marks.

virtual void	SetAxisRange (Double_t xmin, Double_t xmax, Option_t *axis="X")
	Set the "axis" range.

virtual void	SetBarOffset (Float_t offset=0.25)
	Set the bar offset as fraction of the bin width for drawing mode "B".

virtual void	SetBarWidth (Float_t width=0.5)
	Set the width of bars as fraction of the bin width for drawing mode "B".

virtual void	SetBinError (Int_t bin, Double_t error)
	Set the bin Error Note that this resets the bin eror option to be of Normal Type and for the non-empty bin the bin error is set by default to the square root of their content.

virtual void	SetBinError (Int_t binx, Int_t biny, Double_t error)
	See convention for numbering bins in TH1::GetBin.

virtual void	SetBinError (Int_t binx, Int_t biny, Int_t binz, Double_t error)
	See convention for numbering bins in TH1::GetBin.

virtual void	SetBinErrorOption (EBinErrorOpt type)

virtual void	SetBins (Int_t nx, const Double_t *xBins)
	Redefine x axis parameters with variable bin sizes.

virtual void	SetBins (Int_t nx, const Double_t xBins, Int_t ny, const Double_t yBins)
	Redefine x and y axis parameters with variable bin sizes.

virtual void	SetBins (Int_t nx, const Double_t xBins, Int_t ny, const Double_t yBins, Int_t nz, const Double_t *zBins)
	Redefine x, y and z axis parameters with variable bin sizes.

virtual void	SetBins (Int_t nx, Double_t xmin, Double_t xmax)
	Redefine x axis parameters.

virtual void	SetBins (Int_t nx, Double_t xmin, Double_t xmax, Int_t ny, Double_t ymin, Double_t ymax)
	Redefine x and y axis parameters.

virtual void	SetBins (Int_t nx, Double_t xmin, Double_t xmax, Int_t ny, Double_t ymin, Double_t ymax, Int_t nz, Double_t zmin, Double_t zmax)
	Redefine x, y and z axis parameters.

virtual void	SetBuffer (Int_t buffersize, Option_t *option="")
	Set the maximum number of entries to be kept in the buffer.

virtual UInt_t	SetCanExtend (UInt_t extendBitMask)
	Make the histogram axes extendable / not extendable according to the bit mask returns the previous bit mask specifying which axes are extendable.

virtual void	SetCellContent (Int_t binx, Int_t biny, Double_t content)

virtual void	SetCellError (Int_t binx, Int_t biny, Double_t content)

virtual void	SetContent (const Double_t *content)
	Replace bin contents by the contents of array content.

virtual void	SetContour (Int_t nlevels, const Double_t *levels=0)
	Set the number and values of contour levels.

virtual void	SetContourLevel (Int_t level, Double_t value)
	Set value for one contour level.

virtual void	SetDirectory (TDirectory *dir)
	By default, when a histogram is created, it is added to the list of histogram objects in the current directory in memory.

virtual void	SetEntries (Double_t n)

virtual void	SetError (const Double_t *error)
	Replace bin errors by values in array error.

virtual void	SetHighlight (Bool_t set=kTRUE)
	Set highlight (enable/disable) mode for the histogram by default highlight mode is disable.

virtual void	SetLabelColor (Color_t color=1, Option_t *axis="X")
	Set axis labels color.

virtual void	SetLabelFont (Style_t font=62, Option_t *axis="X")
	Set font number used to draw axis labels.

virtual void	SetLabelOffset (Float_t offset=0.005, Option_t *axis="X")
	Set offset between axis and axis' labels.

virtual void	SetLabelSize (Float_t size=0.02, Option_t *axis="X")
	Set size of axis' labels.

virtual void	SetMaximum (Double_t maximum=-1111)

virtual void	SetMinimum (Double_t minimum=-1111)

virtual void	SetName (const char *name)
	Change the name of this histogram.

virtual void	SetNameTitle (const char name, const char title)
	Change the name and title of this histogram.

virtual void	SetNdivisions (Int_t n=510, Option_t *axis="X")
	Set the number of divisions to draw an axis.

virtual void	SetNormFactor (Double_t factor=1)

virtual void	SetOption (Option_t *option=" ")

void	SetStatOverflows (EStatOverflows statOverflows)

virtual void	SetStats (Bool_t stats=kTRUE)
	Set statistics option on/off.

virtual void	SetTickLength (Float_t length=0.02, Option_t *axis="X")
	Set the axis' tick marks length.

virtual void	SetTitle (const char *title)
	See GetStatOverflows for more information.

virtual void	SetTitleFont (Style_t font=62, Option_t *axis="X")
	Set the axis' title font.

virtual void	SetTitleOffset (Float_t offset=1, Option_t *axis="X")
	Specify a parameter offset to control the distance between the axis and the axis' title.

virtual void	SetTitleSize (Float_t size=0.02, Option_t *axis="X")
	Set the axis' title size.

virtual void	SetXTitle (const char *title)

virtual void	SetYTitle (const char *title)

virtual void	SetZTitle (const char *title)

virtual void	Sumw2 (Bool_t flag=kTRUE)
	Create structure to store sum of squares of weights.

void	UseCurrentStyle ()
	Copy current attributes from/to current style.

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TNamed &named)
	TNamed copy ctor.

	TNamed (const TString &name, const TString &title)

virtual	~TNamed ()
	TNamed destructor.

virtual void	Clear (Option_t *option="")
	Set name and title to empty strings ("").

virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects.

virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.

virtual const char *	GetName () const
	Returns name of object.

virtual const char *	GetTitle () const
	Returns title of object.

virtual ULong_t	Hash () const
	Return hash value for this object.

virtual Bool_t	IsSortable () const

virtual void	ls (Option_t *option="") const
	List TNamed name and title.

TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator.

virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract.

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.

ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

virtual const char *	ClassName () const
	Returns name of class to which the object belongs.

virtual void	Delete (Option_t *option="")
	Delete this object.

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: `gROOT->SetSelectedPad(gPad)`.

virtual void	Dump () const
	Dump contents of object on stdout.

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message.

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g.

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray.

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message.

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.

virtual const char *	GetIconName () const
	Returns mime type name of object.

virtual UInt_t	GetUniqueID () const
	Return the unique object id.

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.

Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message.

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.

void	InvertBit (UInt_t f)

Bool_t	IsDestructed () const
	IsDestructed.

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory).

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification.

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.

void	operator delete (void *ptr)
	Operator delete.

void	operator delete[] (void *ptr)
	Operator delete [].

void *	operator new (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz)

void *	operator new[] (size_t sz, void *vp)

TObject &	operator= (const TObject &rhs)
	TObject assignment operator.

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.

void	ResetBit (UInt_t f)

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename.

void	SetBit (UInt_t f)

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message.

R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message.

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.

Public Member Functions inherited from TAttLine
	TAttLine ()
	AttLine default constructor.

	TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth)
	AttLine normal constructor.

virtual	~TAttLine ()
	AttLine destructor.

void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine.

Int_t	DistancetoLine (Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
	Compute distance from point px,py to a line.

virtual Color_t	GetLineColor () const
	Return the line color.

virtual Style_t	GetLineStyle () const
	Return the line style.

virtual Width_t	GetLineWidth () const
	Return the line width.

virtual void	Modify ()
	Change current line attributes if necessary.

virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values.

virtual void	SaveLineAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
	Save line attributes as C++ statement(s) on output stream out.

virtual void	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes.

virtual void	SetLineColor (Color_t lcolor)
	Set the line color.

virtual void	SetLineColorAlpha (Color_t lcolor, Float_t lalpha)
	Set a transparent line color.

virtual void	SetLineStyle (Style_t lstyle)
	Set the line style.

virtual void	SetLineWidth (Width_t lwidth)
	Set the line width.

Public Member Functions inherited from TAttFill
	TAttFill ()
	AttFill default constructor.

	TAttFill (Color_t fcolor, Style_t fstyle)
	AttFill normal constructor.

virtual	~TAttFill ()
	AttFill destructor.

void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill.

virtual Color_t	GetFillColor () const
	Return the fill area color.

virtual Style_t	GetFillStyle () const
	Return the fill area style.

virtual Bool_t	IsTransparent () const

virtual void	Modify ()
	Change current fill area attributes if necessary.

virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values.

virtual void	SaveFillAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
	Save fill attributes as C++ statement(s) on output stream out.

virtual void	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes.

virtual void	SetFillColor (Color_t fcolor)
	Set the fill area color.

virtual void	SetFillColorAlpha (Color_t fcolor, Float_t falpha)
	Set a transparent fill color.

virtual void	SetFillStyle (Style_t fstyle)
	Set the fill area style.

Public Member Functions inherited from TAttMarker
	TAttMarker ()
	TAttMarker default constructor.

	TAttMarker (Color_t color, Style_t style, Size_t msize)
	TAttMarker normal constructor.

virtual	~TAttMarker ()
	TAttMarker destructor.

void	Copy (TAttMarker &attmarker) const
	Copy this marker attributes to a new TAttMarker.

virtual Color_t	GetMarkerColor () const
	Return the marker color.

virtual Size_t	GetMarkerSize () const
	Return the marker size.

virtual Style_t	GetMarkerStyle () const
	Return the marker style.

virtual void	Modify ()
	Change current marker attributes if necessary.

virtual void	ResetAttMarker (Option_t *toption="")
	Reset this marker attributes to the default values.

virtual void	SaveMarkerAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t sizdef=1)
	Save line attributes as C++ statement(s) on output stream out.

virtual void	SetMarkerAttributes ()
	Invoke the DialogCanvas Marker attributes.

virtual void	SetMarkerColor (Color_t mcolor=1)
	Set the marker color.

virtual void	SetMarkerColorAlpha (Color_t mcolor, Float_t malpha)
	Set a transparent marker color.

virtual void	SetMarkerSize (Size_t msize=1)
	Set the marker size.

virtual void	SetMarkerStyle (Style_t mstyle=1)
	Set the marker style.

Public Member Functions inherited from TArrayD
	TArrayD ()
	Default TArrayD ctor.

	TArrayD (const TArrayD &array)
	Copy constructor.

	TArrayD (Int_t n)
	Create TArrayD object and set array size to n doubles.

	TArrayD (Int_t n, const Double_t *array)
	Create TArrayD object and initialize it with values of array.

virtual	~TArrayD ()
	Delete TArrayD object.

void	AddAt (Double_t c, Int_t i)
	Set the double c value at position i in the array.

void	Adopt (Int_t n, Double_t *array)
	Adopt array arr into TArrayD, i.e.

Double_t	At (Int_t i) const

void	Copy (TArrayD &array) const

Double_t *	GetArray ()

const Double_t *	GetArray () const

Double_t	GetAt (Int_t i) const

Stat_t	GetSum () const

TArrayD &	operator= (const TArrayD &rhs)
	TArrayD assignment operator.

Double_t &	operator[] (Int_t i)

Double_t	operator[] (Int_t i) const

void	Reset ()

void	Reset (Double_t val)

void	Set (Int_t n)
	Set size of this array to n doubles.

void	Set (Int_t n, const Double_t *array)
	Set size of this array to n doubles and set the contents This function should not be called if the array was declared via Adopt.

void	SetAt (Double_t v, Int_t i)

Public Member Functions inherited from TArray
	TArray ()

	TArray (const TArray &a)

	TArray (Int_t n)

virtual	~TArray ()

Int_t	GetSize () const

TArray &	operator= (const TArray &rhs)

Protected Member Functions
virtual Double_t	RetrieveBinContent (Int_t bin) const
	Raw retrieval of bin content on internal data structure see convention for numbering bins in TH1::GetBin.

virtual void	UpdateBinContent (Int_t bin, Double_t content)
	Raw update of bin content on internal data structure see convention for numbering bins in TH1::GetBin.

Protected Member Functions inherited from TH2
	TH2 ()
	2-D histogram default constructor.

	TH2 (const char name, const char title, Int_t nbinsx, const Double_t xbins, Int_t nbinsy, const Double_t ybins)
	Constructor for Double_t variable bin size 2-D histograms.

	TH2 (const char name, const char title, Int_t nbinsx, const Double_t *xbins, Int_t nbinsy, Double_t ylow, Double_t yup)
	Constructor for variable bin size (along X axis) 2-D histograms using an input array of type double.

	TH2 (const char name, const char title, Int_t nbinsx, const Float_t xbins, Int_t nbinsy, const Float_t ybins)
	Constructor for variable bin size (along X and Y axis) 2-D histograms using input arrays of type float.

	TH2 (const char name, const char title, Int_t nbinsx, Double_t xlow, Double_t xup, Int_t nbinsy, const Double_t *ybins)
	Constructor for Double_t variable bin size (along Y axis) 2-D histograms.

	TH2 (const char name, const char title, Int_t nbinsx, Double_t xlow, Double_t xup, Int_t nbinsy, Double_t ylow, Double_t yup)
	Constructor for fix bin size 2-D histograms.

virtual Int_t	BufferFill (Double_t x, Double_t y, Double_t w)
	accumulate arguments in buffer.

Int_t	BufferFill (Double_t, Double_t)
	accumulate arguments in buffer.

virtual void	DoFitSlices (bool onX, TF1 f1, Int_t firstbin, Int_t lastbin, Int_t cut, Option_t option, TObjArray *arr)

virtual TProfile *	DoProfile (bool onX, const char name, Int_t firstbin, Int_t lastbin, Option_t option) const

virtual TH1D *	DoProjection (bool onX, const char name, Int_t firstbin, Int_t lastbin, Option_t option) const
	Internal (protected) method for performing projection on the X or Y axis called by ProjectionX or ProjectionY.

virtual TH1D *	DoQuantiles (bool onX, const char *name, Double_t prob) const
	Implementation of quantiles for x or y.

Int_t	Fill (const char *, Double_t)
	Increment bin with namex with a weight w.

Int_t	Fill (Double_t)
	Invalid Fill method.

virtual Double_t	Interpolate (Double_t x) const
	illegal for a TH2

Protected Member Functions inherited from TH1
	TH1 ()
	Histogram default constructor.

	TH1 (const char name, const char title, Int_t nbinsx, const Double_t *xbins)
	Constructor for variable bin size histograms using an input array of type double.

	TH1 (const char name, const char title, Int_t nbinsx, const Float_t *xbins)
	Constructor for variable bin size histograms using an input array of type float.

	TH1 (const char name, const char title, Int_t nbinsx, Double_t xlow, Double_t xup)
	Constructor for fix bin size histograms.

virtual Int_t	AutoP2FindLimits (Double_t min, Double_t max)
	Buffer-based estimate of the histogram range using the power of 2 algorithm.

Int_t	AxisChoice (Option_t *axis) const
	Choose an axis according to "axis".

virtual void	DoFillN (Int_t ntimes, const Double_t x, const Double_t w, Int_t stride=1)
	Internal method to fill histogram content from a vector called directly by TH1::BufferEmpty.

virtual Double_t	DoIntegral (Int_t ix1, Int_t ix2, Int_t iy1, Int_t iy2, Int_t iz1, Int_t iz2, Double_t &err, Option_t *opt, Bool_t doerr=kFALSE) const
	Internal function compute integral and optionally the error between the limits specified by the bin number values working for all histograms (1D, 2D and 3D)

virtual Bool_t	FindNewAxisLimits (const TAxis *axis, const Double_t point, Double_t &newMin, Double_t &newMax)
	finds new limits for the axis so that point is within the range and the limits are compatible with the previous ones (see TH1::Merge).

UInt_t	GetAxisLabelStatus () const
	Internal function used in TH1::Fill to see which axis is full alphanumeric i.e.

virtual Double_t	GetBinErrorSqUnchecked (Int_t bin) const

Bool_t	GetStatOverflowsBehaviour () const

Bool_t	IsEmpty () const
	Check if a histogram is empty (this is a protected method used mainly by TH1Merger )

virtual void	SavePrimitiveHelp (std::ostream &out, const char hname, Option_t option="")
	Helper function for the SavePrimitive functions from TH1 or classes derived from TH1, eg TProfile, TProfile2D.

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected).

void	MakeZombie ()

Protected Member Functions inherited from TArray
Bool_t	BoundsOk (const char *where, Int_t at) const

Bool_t	OutOfBoundsError (const char *where, Int_t i) const
	Generate an out-of-bounds error. Always returns false.

Friends
TH2D	operator* (Float_t c1, TH2D &h1)
	Operator *.

TH2D	operator* (TH2D &h1, Float_t c1)

TH2D	operator* (TH2D &h1, TH2D &h2)
	Operator *.

TH2D	operator+ (TH2D &h1, TH2D &h2)
	Operator +.

TH2D	operator- (TH2D &h1, TH2D &h2)
	Operator -.

TH2D	operator/ (TH2D &h1, TH2D &h2)
	Operator /.

Additional Inherited Members
Public Types inherited from TH1
enum	{ kNoAxis = 0 , kXaxis = BIT(0) , kYaxis = BIT(1) , kZaxis = BIT(2) , kAllAxes = kXaxis \| kYaxis \| kZaxis }
	Enumeration specifying which axes can be extended. More...

enum	{ kNstat = 13 }
	Size of statistics data (size of array used in GetStats()/ PutStats ) More...

enum	EBinErrorOpt { kNormal = 0 , kPoisson = 1 , kPoisson2 = 2 }
	Enumeration specifying type of statistics for bin errors. More...

enum	EStatOverflows { kIgnore = 0 , kConsider = 1 , kNeutral = 2 }
	Enumeration specifying the way to treat statoverflow. More...

enum	EStatusBits { kNoStats = BIT(9) , kUserContour = BIT(10) , kLogX = BIT(15) , kIsZoomed = BIT(16) , kNoTitle = BIT(17) , kIsAverage = BIT(18) , kIsNotW = BIT(19) , kAutoBinPTwo = BIT(20) , kIsHighlight = BIT(21) }
	TH1 status bits. More...

Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) }

enum	EDeprecatedStatusBits { kObjInCanvas = BIT(3) }

enum	EStatusBits { kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) , kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13) }

Static Public Member Functions inherited from TH1
static void	AddDirectory (Bool_t add=kTRUE)
	Sets the flag controlling the automatic add of histograms in memory.

static Bool_t	AddDirectoryStatus ()
	Static function: cannot be inlined on Windows/NT.

static Int_t	FitOptionsMake (Option_t *option, Foption_t &Foption)
	Decode string choptin and fill fitOption structure.

static Int_t	GetDefaultBufferSize ()
	Static function return the default buffer size for automatic histograms the parameter fgBufferSize may be changed via SetDefaultBufferSize.

static Bool_t	GetDefaultSumw2 ()
	Return kTRUE if TH1::Sumw2 must be called when creating new histograms.

static void	SetDefaultBufferSize (Int_t buffersize=1000)
	Static function to set the default buffer size for automatic histograms.

static void	SetDefaultSumw2 (Bool_t sumw2=kTRUE)
	When this static function is called with `sumw2=kTRUE`, all new histograms will automatically activate the storage of the sum of squares of errors, ie TH1::Sumw2 is automatically called.

static void	SmoothArray (Int_t NN, Double_t *XX, Int_t ntimes=1)
	Smooth array xx, translation of Hbook routine hsmoof.F based on algorithm 353QH twice presented by J.

static void	StatOverflows (Bool_t flag=kTRUE)
	if flag=kTRUE, underflows and overflows are used by the Fill functions in the computation of statistics (mean value, StdDev).

static TH1 *	TransformHisto (TVirtualFFT fft, TH1 h_output, Option_t *option)
	For a given transform (first parameter), fills the histogram (second parameter) with the transform output data, specified in the third parameter If the 2nd parameter h_output is empty, a new histogram (TH1D or TH2D) is created and the user is responsible for deleting it.

Static Public Member Functions inherited from TObject
static Longptr_t	GetDtorOnly ()
	Return destructor only flag.

static Bool_t	GetObjectStat ()
	Get status of object stat flag.

static void	SetDtorOnly (void *obj)
	Set destructor only flag.

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable.

Static Public Member Functions inherited from TAttMarker
static Width_t	GetMarkerLineWidth (Style_t style)
	Internal helper function that returns the line width of the given marker style (0 = filled marker)

static Style_t	GetMarkerStyleBase (Style_t style)
	Internal helper function that returns the corresponding marker style with line width 1 for the given style.

Static Public Member Functions inherited from TArray
static TArray *	ReadArray (TBuffer &b, const TClass *clReq)
	Read TArray object from buffer.

static void	WriteArray (TBuffer &b, const TArray *a)
	Write TArray object to buffer.

Public Attributes inherited from TArrayD
Double_t *	fArray

Public Attributes inherited from TArray
Int_t	fN

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(3) }

Static Protected Member Functions inherited from TH1
static Int_t	AutoP2GetBins (Int_t n)
	Auxiliary function to get the next power of 2 integer value larger then n.

static Double_t	AutoP2GetPower2 (Double_t x, Bool_t next=kTRUE)
	Auxiliary function to get the power of 2 next (larger) or previous (smaller) a given x.

static bool	CheckAxisLimits (const TAxis a1, const TAxis a2)
	Check that the axis limits of the histograms are the same.

static bool	CheckBinLabels (const TAxis a1, const TAxis a2)
	Check that axis have same labels.

static bool	CheckBinLimits (const TAxis a1, const TAxis a2)
	Check bin limits.

static bool	CheckConsistency (const TH1 h1, const TH1 h2)
	Check histogram compatibility.

static bool	CheckConsistentSubAxes (const TAxis a1, Int_t firstBin1, Int_t lastBin1, const TAxis a2, Int_t firstBin2=0, Int_t lastBin2=0)
	Check that two sub axis are the same.

static bool	CheckEqualAxes (const TAxis a1, const TAxis a2)
	Check that the axis are the same.

static Bool_t	RecomputeAxisLimits (TAxis &destAxis, const TAxis &anAxis)
	Finds new limits for the axis for the Merge function.

static Bool_t	SameLimitsAndNBins (const TAxis &axis1, const TAxis &axis2)
	Same limits and bins.

Protected Attributes inherited from TH2
Double_t	fScalefactor
	Scale factor.

Double_t	fTsumwxy
	Total Sum of weightXY.

Double_t	fTsumwy
	Total Sum of weight*Y.

Double_t	fTsumwy2
	Total Sum of weightYY.

Protected Attributes inherited from TH1
Short_t	fBarOffset
	(1000*offset) for bar charts or legos

Short_t	fBarWidth
	(1000*width) for bar charts or legos

EBinErrorOpt	fBinStatErrOpt
	Option for bin statistical errors.

Double_t *	fBuffer
	[fBufferSize] entry buffer

Int_t	fBufferSize
	fBuffer size

TArrayD	fContour
	Array to display contour levels.

Int_t	fDimension
	! Histogram dimension (1, 2 or 3 dim)

TDirectory *	fDirectory
	! Pointer to directory holding this histogram

Double_t	fEntries
	Number of entries.

TList *	fFunctions
	->Pointer to list of functions (fits and user)

Double_t *	fIntegral
	! Integral of bins used by GetRandom

Double_t	fMaximum
	Maximum value for plotting.

Double_t	fMinimum
	Minimum value for plotting.

Int_t	fNcells
	Number of bins(1D), cells (2D) +U/Overflows.

Double_t	fNormFactor
	Normalization factor.

TString	fOption
	Histogram options.

TVirtualHistPainter *	fPainter
	! Pointer to histogram painter

EStatOverflows	fStatOverflows
	Per object flag to use under/overflows in statistics.

TArrayD	fSumw2
	Array of sum of squares of weights.

Double_t	fTsumw
	Total Sum of weights.

Double_t	fTsumw2
	Total Sum of squares of weights.

Double_t	fTsumwx
	Total Sum of weight*X.

Double_t	fTsumwx2
	Total Sum of weightXX.

TAxis	fXaxis
	X axis descriptor.

TAxis	fYaxis
	Y axis descriptor.

TAxis	fZaxis
	Z axis descriptor.

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Protected Attributes inherited from TAttLine
Color_t	fLineColor
	Line color.

Style_t	fLineStyle
	Line style.

Width_t	fLineWidth
	Line width.

Protected Attributes inherited from TAttFill
Color_t	fFillColor
	Fill area color.

Style_t	fFillStyle
	Fill area style.

Protected Attributes inherited from TAttMarker
Color_t	fMarkerColor
	Marker color.

Size_t	fMarkerSize
	Marker size.

Style_t	fMarkerStyle
	Marker style.

Static Protected Attributes inherited from TH1
static Bool_t	fgAddDirectory = kTRUE
	! Flag to add histograms to the directory

static Int_t	fgBufferSize = 1000
	! Default buffer size for automatic histograms

static Bool_t	fgDefaultSumw2 = kFALSE
	! Flag to call TH1::Sumw2 automatically at histogram creation time

static Bool_t	fgStatOverflows = kFALSE
	! Flag to use under/overflows in statistics

#include <TH2.h>

Inheritance diagram for TH2D:

[legend]

Constructor & Destructor Documentation

◆ TH2D() [1/8]

TH2D::TH2D ( )

Constructor.

Definition at line 3815 of file TH2.cxx.