TProfile Class Reference

Profile Historam.

Profile histograms are used to display the mean value of Y and its error for each bin in X. The displayed error is by default the standard error on the mean (i.e. the standard deviation divided by the sqrt(n) ) Profile histograms are in many cases an elegant replacement of two-dimensional histograms : the inter-relation of two measured quantities X and Y can always be visualized by a two-dimensional histogram or scatter-plot; its representation on the line-printer is not particularly satisfactory, except for sparse data. If Y is an unknown (but single-valued) approximate function of X, this function is displayed by a profile histogram with much better precision than by a scatter-plot.

The following formulae show the cumulated contents (capital letters) and the values displayed by the printing or plotting routines (small letters) of the elements for bin J.

                                              2
  H(J)  =  sum Y                  E(J)  =  sum Y
  l(J)  =  sum l                  L(J)  =  sum l
  h(J)  =  H(J)/L(J)                     mean of Y,
  s(J)  =  sqrt(E(J)/L(J)- h(J)**2)      standard deviation of Y  (e.g. RMS)
  e(J)  =  s(J)/sqrt(L(J))               standard error on the mean

The displayed bin content for bin J of a TProfile is always h(J). The corresponding bin error is by default e(J). In case the option "s" is used (in the constructor or by calling TProfile::BuildOptions) the displayed error is s(J)

In the special case where s(J) is zero (eg, case of 1 entry only in one bin) the bin error e(J) is computed from the average of the s(J) for all bins if the static function TProfile::Approximate has been called. This simple/crude approximation was suggested in order to keep the bin during a fit operation. But note that this approximation is not the default behaviour. See also TProfile::BuildOptions for other error options and more detailed explanations

Example of a profile histogram with its graphics output

{
  TCanvas *c1 = new TCanvas("c1","Profile histogram example",200,10,700,500);
  hprof  = new TProfile("hprof","Profile of pz versus px",100,-4,4,0,20);
  Float_t px, py, pz;
  for ( Int_t i=0; i<25000; i++) {
    gRandom->Rannor(px,py);
    pz = px*px + py*py;
    hprof->Fill(px,pz,1);
  }
  hprof->Draw();
}

Definition at line 34 of file TProfile.h.

Public Member Functions
	TProfile ()
	TProfile (const char *name, const char *title, Int_t nbinsx, Double_t xlow, Double_t xup, Option_t *option="")
	Normal Constructor for Profile histograms The first five parameters are similar to TH1D::TH1D. More...
	TProfile (const char *name, const char *title, Int_t nbinsx, Double_t xlow, Double_t xup, Double_t ylow, Double_t yup, Option_t *option="")
	Constructor for Profile histograms with range in y The first five parameters are similar to TH1D::TH1D. More...
	TProfile (const char *name, const char *title, Int_t nbinsx, const Float_t *xbins, Option_t *option="")
	Constructor for Profile histograms with variable bin size See TProfile::BuildOptions for more explanations on errors see also comments in the TH1 base class constructors. More...
	TProfile (const char *name, const char *title, Int_t nbinsx, const Double_t *xbins, Option_t *option="")
	Constructor for Profile histograms with variable bin size See TProfile::BuildOptions for more explanations on errors see also comments in the TH1 base class constructors. More...
	TProfile (const char *name, const char *title, Int_t nbinsx, const Double_t *xbins, Double_t ylow, Double_t yup, Option_t *option="")
	Constructor for Profile histograms with variable bin size See TProfile::BuildOptions for more explanations on errors. More...
	TProfile (const TProfile &profile)
	Copy constructor. More...
virtual	~TProfile ()
	Default destructor for Profile histograms. More...
virtual Bool_t	Add (TF1 *h1, Double_t c1=1, Option_t *option="")
	Performs the operation: this = this + c1*f1. More...
virtual Bool_t	Add (const TH1 *h1, Double_t c1=1)
	Performs the operation: this = this + c1*h1. More...
virtual Bool_t	Add (const TH1 *h1, const TH1 *h2, Double_t c1=1, Double_t c2=1)
	Replace contents of this profile by the addition of h1 and h2 this = c1*h1 + c2*h2. More...
virtual Int_t	BufferEmpty (Int_t action=0)
	Fill histogram with all entries in the buffer. More...
void	BuildOptions (Double_t ymin, Double_t ymax, Option_t *option)
	Set Profile histogram structure and options. More...
virtual void	Copy (TObject &hnew) const
	Copy a Profile histogram to a new profile histogram. More...
virtual Bool_t	Divide (TF1 *h1, Double_t c1=1)
	Performs the operation: this = this/(c1*f1) This function is not implemented for the TProfile. More...
virtual Bool_t	Divide (const TH1 *h1)
	Divide this profile by h1 this = this/h1 This function accepts to divide a TProfile by a histogram. More...
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 profile by the division of h1 by h2 this = c1*h1/(c2*h2) More...
virtual void	ExtendAxis (Double_t x, TAxis *axis)
	Profile histogram is resized along x axis such that x is in the axis range. More...
virtual Int_t	Fill (Double_t x, Double_t y)
	Fill a Profile histogram (no weights) More...
virtual Int_t	Fill (const char *namex, Double_t y)
	Fill a Profile histogram (no weights) More...
virtual Int_t	Fill (Double_t x, Double_t y, Double_t w)
	Fill a Profile histogram with weights. More...
virtual Int_t	Fill (const char *namex, Double_t y, Double_t w)
	Fill a Profile histogram with weights. More...
virtual void	FillN (Int_t ntimes, const Double_t *x, const Double_t *y, const Double_t *w, Int_t stride=1)
	Fill a Profile histogram with weights. More...
virtual Double_t	GetBinContent (Int_t bin) const
	Return bin content of a Profile histogram. More...
virtual Double_t	GetBinContent (Int_t bin, Int_t) const
virtual Double_t	GetBinContent (Int_t bin, Int_t, Int_t) const
virtual Double_t	GetBinError (Int_t bin) const
	Return bin error of a Profile histogram. More...
virtual Double_t	GetBinError (Int_t bin, Int_t) const
virtual Double_t	GetBinError (Int_t bin, Int_t, Int_t) const
virtual Double_t	GetBinEntries (Int_t bin) const
	Return bin entries of a Profile histogram. More...
virtual Double_t	GetBinEffectiveEntries (Int_t bin) const
	Return bin effective entries for a weighted filled Profile histogram. More...
virtual TArrayD *	GetBinSumw2 ()
virtual const TArrayD *	GetBinSumw2 () const
Option_t *	GetErrorOption () const
	Return option to compute profile errors. More...
virtual void	GetStats (Double_t *stats) const
	fill the array stats from the contents of this profile The array stats must be correctly dimensionned in the calling program. More...
virtual Double_t	GetYmin () const
virtual Double_t	GetYmax () const
virtual void	LabelsDeflate (Option_t *axis="X")
	Reduce the number of bins for this axis to the number of bins having a label. More...
virtual void	LabelsInflate (Option_t *axis="X")
	Double the number of bins for axis. More...
virtual void	LabelsOption (Option_t *option="h", Option_t *axis="X")
	Set option(s) to draw axis with labels option = "a" sort by alphabetic order = ">" sort by decreasing values = "<" sort by increasing values = "h" draw labels horizonthal = "v" draw labels vertical = "u" draw labels up (end of label right adjusted) = "d" draw labels down (start of label left adjusted) More...
virtual Long64_t	Merge (TCollection *list)
	Merge all histograms in the collection in this histogram. More...
virtual Bool_t	Multiply (TF1 *h1, Double_t c1=1)
	Performs the operation: this = this*c1*f1. More...
virtual Bool_t	Multiply (const TH1 *h1)
	Multiply this profile by h1. More...
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 profile by multiplication of h1 by h2. More...
TH1D *	ProjectionX (const char *name="_px", Option_t *option="e") const
	Project this profile into a 1-D histogram along X. More...
virtual void	PutStats (Double_t *stats)
	Replace current statistics with the values in array stats. More...
TH1 *	Rebin (Int_t ngroup=2, const char *newname="", const Double_t *xbins=0)
	Rebin this profile grouping ngroup bins together case 1 xbins=0 if newname is not blank a new temporary profile hnew is created. More...
virtual void	Reset (Option_t *option="")
	Reset contents of a Profile histogram. More...
virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save primitive as a C++ statement(s) on output stream out. More...
virtual void	Scale (Double_t c1=1, Option_t *option="")
	Multiply this profile by a constant c1. More...
virtual void	SetBinEntries (Int_t bin, Double_t w)
	Set the number of entries in bin. More...
virtual void	SetBins (Int_t nbins, Double_t xmin, Double_t xmax)
	Redefine x axis parameters. More...
virtual void	SetBins (Int_t nx, const Double_t *xbins)
	Redefine x axis parameters. More...
virtual void	SetBinsLength (Int_t n=-1)
	Set total number of bins including under/overflow Reallocate bin contents array. More...
virtual void	SetBuffer (Int_t buffersize, Option_t *option="")
	set the buffer size in units of 8 bytes (double) More...
virtual void	SetErrorOption (Option_t *option="")
	Set option to compute profile errors. More...
virtual void	Sumw2 (Bool_t flag=kTRUE)
	Create/delete structure to store sum of squares of weights per bin — This is needed to compute the correct statistical quantities of a profile filled with weights. More...
Public Member Functions inherited from TH1D
	TH1D ()
	TH1D (const char *name, const char *title, Int_t nbinsx, Double_t xlow, Double_t xup)
	Create a 1-Dim histogram with fix bins of type double (see TH1::TH1 for explanation of parameters) More...
	TH1D (const char *name, const char *title, Int_t nbinsx, const Float_t *xbins)
	Create a 1-Dim histogram with variable bins of type double (see TH1::TH1 for explanation of parameters) More...
	TH1D (const char *name, const char *title, Int_t nbinsx, const Double_t *xbins)
	Create a 1-Dim histogram with variable bins of type double (see TH1::TH1 for explanation of parameters) More...
	TH1D (const TVectorD &v)
	Create a histogram from a TVectorD by default the histogram name is "TVectorD" and title = "". More...
	TH1D (const TH1D &h1d)
	Constructor. More...
TH1D &	operator= (const TH1D &h1)
	Operator =. More...
virtual	~TH1D ()
	Destructor. More...
virtual void	AddBinContent (Int_t bin)
	Increment bin content by 1. More...
virtual void	AddBinContent (Int_t bin, Double_t w)
	Increment bin content by a weight w. More...
	ClassDef (TH1D, 2) friend TH1D operator*(Double_t c1
Public Member Functions inherited from TH1
virtual	~TH1 ()
	Histogram default destructor. More...
virtual void	Browse (TBrowser *b)
	Browe the Histogram object. More...
virtual Bool_t	CanExtendAllAxes () const
	returns true if all axes are extendable More...
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 More...
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. More...
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. More...
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. More...
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. More...
TObject *	Clone (const char *newname=0) const
	Make a complete copy of the underlying object. More...
virtual void	DirectoryAutoAdd (TDirectory *)
	Perform the automatic addition of the histogram to the given directory. More...
virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Compute distance from point px,py to a line. More...
virtual void	Draw (Option_t *option="")
	Draw this histogram with options. More...
virtual TH1 *	DrawCopy (Option_t *option="", const char *name_postfix="_copy") const
	Copy this histogram and Draw in the current pad. More...
virtual TH1 *	DrawNormalized (Option_t *option="", Double_t norm=1) const
	Draw a normalized copy of this histogram. More...
virtual void	DrawPanel ()
	Display a panel with all histogram drawing options. More...
virtual void	Eval (TF1 *f1, Option_t *option="")
	Evaluate function f1 at the center of bins of this histogram. More...
virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to one event. More...
virtual TH1 *	FFT (TH1 *h_output, Option_t *option)
	This function allows to do discrete Fourier transforms of TH1 and TH2. More...
virtual void	FillRandom (const char *fname, Int_t ntimes=5000)
	Fill histogram following distribution in function fname. More...
virtual void	FillRandom (TH1 *h, Int_t ntimes=5000)
	Fill histogram following distribution in histogram h. More...
virtual Int_t	FindBin (Double_t x, Double_t y=0, Double_t z=0)
	Return Global bin number corresponding to x,y,z. More...
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. More...
virtual Int_t	FindFirstBinAbove (Double_t threshold=0, Int_t axis=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. More...
virtual Int_t	FindLastBinAbove (Double_t threshold=0, Int_t axis=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. More...
virtual TObject *	FindObject (const char *name) const
	search object named name in the list of functions More...
virtual TObject *	FindObject (const TObject *obj) const
	search object obj in the list of functions More...
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. More...
virtual TFitResultPtr	Fit (TF1 *f1, Option_t *option="", Option_t *goption="", Double_t xmin=0, Double_t xmax=0)
	Fit histogram with function f1. More...
virtual void	FitPanel ()
	Display a panel with all histogram fit options. More...
TH1 *	GetAsymmetry (TH1 *h2, Double_t c2=1, Double_t dc2=0)
	Return an histogram containing the asymmetry of this histogram with h2, where the asymmetry is defined as: More...
Int_t	GetBufferLength () const
Int_t	GetBufferSize () const
const Double_t *	GetBuffer () const
virtual Double_t *	GetIntegral ()
	Return a pointer to the array of bins integral. More...
TH1 *	GetCumulative (Bool_t forward=kTRUE, const char *suffix="_cumulative") const
	Return a pointer to an histogram containing the cumulative The cumulative can be computed both in the forward (default) or backward direction; the name of the new histogram is constructed from the name of this histogram with the suffix suffix appended. More...
TList *	GetListOfFunctions () const
virtual Int_t	GetNdivisions (Option_t *axis="X") const
	Return the number of divisions for "axis". More...
virtual Color_t	GetAxisColor (Option_t *axis="X") const
	Return the number of divisions for "axis". More...
virtual Color_t	GetLabelColor (Option_t *axis="X") const
	Return the "axis" label color. More...
virtual Style_t	GetLabelFont (Option_t *axis="X") const
	Return the "axis" label font. More...
virtual Float_t	GetLabelOffset (Option_t *axis="X") const
	Return the "axis" label offset. More...
virtual Float_t	GetLabelSize (Option_t *axis="X") const
	Return the "axis" label size. More...
virtual Style_t	GetTitleFont (Option_t *axis="X") const
	Return the "axis" title font. More...
virtual Float_t	GetTitleOffset (Option_t *axis="X") const
	Return the "axis" title offset. More...
virtual Float_t	GetTitleSize (Option_t *axis="X") const
	Return the "axis" title size. More...
virtual Float_t	GetTickLength (Option_t *axis="X") const
	Return the "axis" tick length. More...
virtual Float_t	GetBarOffset () const
virtual Float_t	GetBarWidth () const
virtual Int_t	GetContour (Double_t *levels=0)
	Return contour values into array levels if pointer levels is non zero. More...
virtual Double_t	GetContourLevel (Int_t level) const
	Return value of contour number level use GetContour to return the array of all contour levels. More...
virtual Double_t	GetContourLevelPad (Int_t level) const
	Return the value of contour number "level" in Pad coordinates ie: if the Pad is in log scale along Z it returns le log of the contour level value. More...
virtual Int_t	GetBin (Int_t binx, Int_t biny=0, Int_t binz=0) const
	Return Global bin number corresponding to binx,y,z. More...
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 More...
virtual Double_t	GetBinCenter (Int_t bin) const
	return bin center for 1D historam Better to use h1.GetXaxis().GetBinCenter(bin) More...
virtual Double_t	GetBinErrorLow (Int_t bin) const
	Return lower error associated to bin number bin. More...
virtual Double_t	GetBinErrorUp (Int_t bin) const
	Return upper error associated to bin number bin. More...
virtual EBinErrorOpt	GetBinErrorOption () const
virtual Double_t	GetBinLowEdge (Int_t bin) const
	return bin lower edge for 1D historam Better to use h1.GetXaxis().GetBinLowEdge(bin) More...
virtual Double_t	GetBinWidth (Int_t bin) const
	return bin width for 1D historam Better to use h1.GetXaxis().GetBinWidth(bin) More...
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 In case several bins in the specified range with diff=0 are found the first bin found is returned in binx. More...
virtual void	GetCenter (Double_t *center) const
	Fill array with center of bins for 1D histogram Better to use h1.GetXaxis().GetCenter(center) More...
TDirectory *	GetDirectory () const
virtual Double_t	GetEntries () const
	return the current number of entries More...
virtual Double_t	GetEffectiveEntries () const
	number of effective entries of the histogram, neff = (Sum of weights )^2 / (Sum of weight^2 ) In case of an unweighted histogram this number is equivalent to the number of entries of the histogram. More...
virtual TF1 *	GetFunction (const char *name) const
	Return pointer to function with name. More...
virtual Int_t	GetDimension () const
virtual Double_t	GetKurtosis (Int_t axis=1) const
	For axis =1, 2 or 3 returns kurtosis of the histogram along x, y or z axis. More...
virtual void	GetLowEdge (Double_t *edge) const
	Fill array with low edge of bins for 1D histogram Better to use h1.GetXaxis().GetLowEdge(edge) More...
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. More...
virtual Int_t	GetMaximumBin () const
	Return location of bin with maximum value in the range. More...
virtual Int_t	GetMaximumBin (Int_t &locmax, Int_t &locmay, Int_t &locmaz) const
	Return location of bin with maximum value in the range. More...
virtual Double_t	GetMaximumStored () const
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. More...
virtual Int_t	GetMinimumBin () const
	Return location of bin with minimum value in the range. More...
virtual Int_t	GetMinimumBin (Int_t &locmix, Int_t &locmiy, Int_t &locmiz) const
	Return location of bin with minimum value in the range. More...
virtual Double_t	GetMinimumStored () 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. More...
virtual Double_t	GetMeanError (Int_t axis=1) const
	Return standard error of mean of this histogram along the X axis. More...
virtual Int_t	GetNbinsX () const
virtual Int_t	GetNbinsY () const
virtual Int_t	GetNbinsZ () const
virtual Int_t	GetNcells () const
virtual Double_t	GetNormFactor () const
virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Redefines TObject::GetObjectInfo. More...
Option_t *	GetOption () const
TVirtualHistPainter *	GetPainter (Option_t *option="")
	return pointer to painter if painter does not exist, it is created More...
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. More...
virtual Double_t	GetRandom () const
	return a random number distributed according the histogram bin contents. More...
virtual Double_t	GetStdDev (Int_t axis=1) const
	Returns the Standard Deviation (Sigma). More...
virtual Double_t	GetStdDevError (Int_t axis=1) const
	Return error of standard deviation estimation for Normal distribution. More...
virtual Double_t	GetSumOfWeights () const
	Return the sum of weights excluding under/overflows. More...
virtual TArrayD *	GetSumw2 ()
virtual const TArrayD *	GetSumw2 () const
virtual Int_t	GetSumw2N () const
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
	For axis = 1, 2 or 3 returns skewness of the histogram along x, y or z axis. More...
TAxis *	GetXaxis ()
TAxis *	GetYaxis ()
TAxis *	GetZaxis ()
const TAxis *	GetXaxis () const
const TAxis *	GetYaxis () const
const TAxis *	GetZaxis () const
virtual Double_t	Integral (Option_t *option="") const
	Return integral of bin contents. More...
virtual Double_t	Integral (Int_t binx1, Int_t binx2, Option_t *option="") const
	Return integral of bin contents in range [binx1,binx2] By default the integral is computed as the sum of bin contents in the range. More...
virtual Double_t	IntegralAndError (Int_t binx1, Int_t binx2, Double_t &err, Option_t *option="") const
	Return integral of bin contents in range [binx1,binx2] and its error By default the integral is computed as the sum of bin contents in the range. More...
virtual Double_t	Interpolate (Double_t x)
	Given a point x, approximates the value via linear interpolation based on the two nearest bin centers Andy Mastbaum 10/21/08. More...
virtual Double_t	Interpolate (Double_t x, Double_t y)
virtual Double_t	Interpolate (Double_t x, Double_t y, Double_t z)
Bool_t	IsBinOverflow (Int_t bin) const
Bool_t	IsBinUnderflow (Int_t bin) const
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. More...
virtual Double_t	AndersonDarlingTest (const TH1 *h2, Double_t &advalue) const
	Same funciton as above but returning also the test statistic value. More...
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. More...
virtual void	Paint (Option_t *option="")
	Control routine to paint any kind of histograms. More...
virtual void	Print (Option_t *option="") const
	Print some global quantities for this histogram. More...
virtual TH1 *	RebinX (Int_t ngroup=2, const char *newname="")
virtual void	Rebuild (Option_t *option="")
	Using the current bin info, recompute the arrays for contents and errors. More...
virtual void	RecursiveRemove (TObject *obj)
	Recursively remove object from the list of functions. More...
virtual void	ResetStats ()
	Reset the statistics including the number of entries and replace with values calculates from bin content The number of entries is set to the total bin content or (in case of weighted histogram) to number of effective entries. More...
virtual void	SetAxisColor (Color_t color=1, Option_t *axis="X")
	Set color to draw the axis line and tick marks. More...
virtual void	SetAxisRange (Double_t xmin, Double_t xmax, Option_t *axis="X")
	Set the "axis" range. More...
virtual void	SetBarOffset (Float_t offset=0.25)
virtual void	SetBarWidth (Float_t width=0.5)
virtual void	SetBinContent (Int_t bin, Double_t content)
	Set bin content see convention for numbering bins in TH1::GetBin In case the bin number is greater than the number of bins and the timedisplay option is set or CanExtendAllAxes(), the number of bins is automatically doubled to accommodate the new bin. More...
virtual void	SetBinContent (Int_t bin, Int_t, Double_t content)
virtual void	SetBinContent (Int_t bin, Int_t, Int_t, Double_t content)
virtual void	SetBinError (Int_t bin, Double_t error)
	see convention for numbering bins in TH1::GetBin More...
virtual void	SetBinError (Int_t binx, Int_t biny, Double_t error)
	see convention for numbering bins in TH1::GetBin More...
virtual void	SetBinError (Int_t binx, Int_t biny, Int_t binz, Double_t error)
	see convention for numbering bins in TH1::GetBin More...
virtual void	SetBinErrorOption (EBinErrorOpt type)
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 More...
virtual void	SetContent (const Double_t *content)
	Replace bin contents by the contents of array content. More...
virtual void	SetContour (Int_t nlevels, const Double_t *levels=0)
	Set the number and values of contour levels. More...
virtual void	SetContourLevel (Int_t level, Double_t value)
	Set value for one contour level. More...
virtual void	SetDirectory (TDirectory *dir)
	By default when an histogram is created, it is added to the list of histogram objects in the current directory in memory. More...
virtual void	SetEntries (Double_t n)
virtual void	SetError (const Double_t *error)
	Replace bin errors by values in array error. More...
virtual void	SetLabelColor (Color_t color=1, Option_t *axis="X")
	Set axis labels color. More...
virtual void	SetLabelFont (Style_t font=62, Option_t *axis="X")
	Set font number used to draw axis labels. More...
virtual void	SetLabelOffset (Float_t offset=0.005, Option_t *axis="X")
	Set offset between axis and axis' labels. More...
virtual void	SetLabelSize (Float_t size=0.02, Option_t *axis="X")
	Set size of axis' labels. More...
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. More...
virtual void	SetNameTitle (const char *name, const char *title)
	Change the name and title of this histogram. More...
virtual void	SetNdivisions (Int_t n=510, Option_t *axis="X")
	Set the number of divisions to draw an axis. More...
virtual void	SetNormFactor (Double_t factor=1)
virtual void	SetStats (Bool_t stats=kTRUE)
	Set statistics option on/off. More...
virtual void	SetOption (Option_t *option=" ")
virtual void	SetTickLength (Float_t length=0.02, Option_t *axis="X")
	Set the axis' tick marks length. More...
virtual void	SetTitleFont (Style_t font=62, Option_t *axis="X")
	The the axis' title font. More...
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. More...
virtual void	SetTitleSize (Float_t size=0.02, Option_t *axis="X")
	The the axis' title size. More...
virtual void	SetTitle (const char *title)
	Change (i.e. More...
virtual void	SetXTitle (const char *title)
virtual void	SetYTitle (const char *title)
virtual void	SetZTitle (const char *title)
virtual TH1 *	ShowBackground (Int_t niter=20, Option_t *option="same")
	This function calculates the background spectrum in this histogram. More...
virtual Int_t	ShowPeaks (Double_t sigma=2, Option_t *option="", Double_t threshold=0.05)
	Interface to TSpectrum::Search. More...
virtual void	Smooth (Int_t ntimes=1, Option_t *option="")
	Smooth bin contents of this histogram. More...
void	UseCurrentStyle ()
	Copy current attributes from/to current style. More...
virtual Double_t	GetCellContent (Int_t binx, Int_t biny) const
virtual Double_t	GetCellError (Int_t binx, Int_t biny) const
virtual void	RebinAxis (Double_t x, TAxis *axis)
virtual void	SetCellContent (Int_t binx, Int_t biny, Double_t content)
virtual void	SetCellError (Int_t binx, Int_t biny, Double_t content)
Public Member Functions inherited from TNamed
	TNamed ()
	TNamed (const char *name, const char *title)
	TNamed (const TString &name, const TString &title)
	TNamed (const TNamed &named)
TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator. More...
virtual	~TNamed ()
virtual void	Clear (Option_t *option="")
	Set name and title to empty strings (""). More...
virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects. More...
virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer. More...
virtual const char *	GetName () const
	Returns name of object. More...
virtual const char *	GetTitle () const
	Returns title of object. More...
virtual ULong_t	Hash () const
	Return hash value for this object. More...
virtual Bool_t	IsSortable () const
virtual void	ls (Option_t *option="") const
	List TNamed name and title. More...
virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject. More...
Public Member Functions inherited from TObject
	TObject ()
	TObject (const TObject &object)
	TObject copy ctor. More...
TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...
virtual	~TObject ()
	TObject destructor. More...
virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...
virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...
virtual void	Delete (Option_t *option="")
	Delete this object. More...
virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...
virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current pad. More...
virtual void	Dump () const
	Dump contents of object on stdout. More...
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. More...
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...
virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...
virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...
virtual const char *	GetIconName () const
	Returns mime type name of object. More...
virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...
virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...
virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...
virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...
virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...
Bool_t	IsOnHeap () const
Bool_t	IsZombie () const
virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...
virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...
virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...
virtual void	SaveAs (const char *filename="", Option_t *option="") const
	Save this object in the file specified by filename. More...
virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...
virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...
virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...
void *	operator new (size_t sz)
void *	operator new[] (size_t sz)
void *	operator new (size_t sz, void *vp)
void *	operator new[] (size_t sz, void *vp)
void	operator delete (void *ptr)
	Operator delete. More...
void	operator delete[] (void *ptr)
	Operator delete []. More...
void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...
void	SetBit (UInt_t f)
void	ResetBit (UInt_t f)
Bool_t	TestBit (UInt_t f) const
Int_t	TestBits (UInt_t f) const
void	InvertBit (UInt_t f)
virtual void	Info (const char *method, const char *msgfmt,...) const
	Issue info message. More...
virtual void	Warning (const char *method, const char *msgfmt,...) const
	Issue warning message. More...
virtual void	Error (const char *method, const char *msgfmt,...) const
	Issue error message. More...
virtual void	SysError (const char *method, const char *msgfmt,...) const
	Issue system error message. More...
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message. More...
void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
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). More...
void	Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...
Public Member Functions inherited from TAttLine
	TAttLine ()
	AttLine default constructor. More...
	TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth)
	AttLine normal constructor. More...
virtual	~TAttLine ()
	AttLine destructor. More...
void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine. More...
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. More...
virtual Color_t	GetLineColor () const
virtual Style_t	GetLineStyle () const
virtual Width_t	GetLineWidth () const
virtual void	Modify ()
	Change current line attributes if necessary. More...
virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values. More...
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. More...
virtual void	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes. More...
virtual void	SetLineColor (Color_t lcolor)
virtual void	SetLineColorAlpha (Color_t lcolor, Float_t lalpha)
	Set a transparent line color. More...
virtual void	SetLineStyle (Style_t lstyle)
virtual void	SetLineWidth (Width_t lwidth)
	ClassDef (TAttLine, 2)
Public Member Functions inherited from TAttFill
	TAttFill ()
	TAttFill (Color_t fcolor, Style_t fstyle)
	AttFill normal constructor. More...
virtual	~TAttFill ()
	AttFill destructor. More...
void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill. More...
virtual Color_t	GetFillColor () const
virtual Style_t	GetFillStyle () const
virtual Bool_t	IsTransparent () const
virtual void	Modify ()
	Change current fill area attributes if necessary. More...
virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values. More...
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. More...
virtual void	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes. More...
virtual void	SetFillColor (Color_t fcolor)
virtual void	SetFillColorAlpha (Color_t fcolor, Float_t falpha)
	Set a transparent fill color. More...
virtual void	SetFillStyle (Style_t fstyle)
Public Member Functions inherited from TAttMarker
	TAttMarker ()
	TAttMarker (Color_t color, Style_t style, Size_t msize)
	TAttMarker normal constructor. More...
virtual	~TAttMarker ()
	TAttMarker destructor. More...
void	Copy (TAttMarker &attmarker) const
	Copy this marker attributes to a new TAttMarker. More...
virtual Color_t	GetMarkerColor () const
virtual Style_t	GetMarkerStyle () const
virtual Size_t	GetMarkerSize () const
virtual void	Modify ()
	Change current marker attributes if necessary. More...
virtual void	ResetAttMarker (Option_t *toption="")
	Reset this marker attributes to the default values. More...
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. More...
virtual void	SetMarkerAttributes ()
	Invoke the DialogCanvas Marker attributes. More...
virtual void	SetMarkerColor (Color_t mcolor=1)
virtual void	SetMarkerColorAlpha (Color_t mcolor, Float_t malpha)
	Set a transparent marker color. More...
virtual void	SetMarkerStyle (Style_t mstyle=1)
virtual void	SetMarkerSize (Size_t msize=1)
	ClassDef (TAttMarker, 2)
Public Member Functions inherited from TArrayD
	TArrayD ()
	TArrayD (Int_t n)
	Create TArrayD object and set array size to n doubles. More...
	TArrayD (Int_t n, const Double_t *array)
	Create TArrayD object and initialize it with values of array. More...
	TArrayD (const TArrayD &array)
	Copy constructor. More...
TArrayD &	operator= (const TArrayD &rhs)
	TArrayD assignment operator. More...
virtual	~TArrayD ()
	Delete TArrayD object. More...
void	Adopt (Int_t n, Double_t *array)
	Adopt array arr into TArrayD, i.e. More...
void	AddAt (Double_t c, Int_t i)
	Add double c at position i. Check for out of bounds. More...
Double_t	At (Int_t i) const
void	Copy (TArrayD &array) const
const Double_t *	GetArray () const
Double_t *	GetArray ()
Double_t	GetAt (Int_t i) const
Stat_t	GetSum () const
void	Reset ()
void	Reset (Double_t val)
void	Set (Int_t n)
	Set size of this array to n doubles. More...
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. More...
void	SetAt (Double_t v, Int_t i)
Double_t &	operator[] (Int_t i)
Double_t	operator[] (Int_t i) const
Public Member Functions inherited from TArray
	TArray ()
	TArray (Int_t n)
	TArray (const TArray &a)
TArray &	operator= (const TArray &rhs)
virtual	~TArray ()
Int_t	GetSize () const

Static Public Member Functions
static void	Approximate (Bool_t approx=kTRUE)
	static function set the fgApproximate flag. More...
Static Public Member Functions inherited from TH1
static Int_t	FitOptionsMake (Option_t *option, Foption_t &Foption)
	flag to call TH1::Sumw2 automatically at histogram creation time More...
static void	AddDirectory (Bool_t add=kTRUE)
	Sets the flag controlling the automatic add of histograms in memory. More...
static Bool_t	AddDirectoryStatus ()
	static function: cannot be inlined on Windows/NT More...
static Int_t	GetDefaultBufferSize ()
	static function return the default buffer size for automatic histograms the parameter fgBufferSize may be changed via SetDefaultBufferSize More...
static Bool_t	GetDefaultSumw2 ()
	return kTRUE if TH1::Sumw2 must be called when creating new histograms. More...
static void	SetDefaultBufferSize (Int_t buffersize=1000)
	static function to set the default buffer size for automatic histograms. More...
static void	SetDefaultSumw2 (Bool_t sumw2=kTRUE)
	static function. More...
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. More...
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). More...
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. More...
Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...
static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...
static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...
static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...
Static Public Member Functions inherited from TArray
static TArray *	ReadArray (TBuffer &b, const TClass *clReq)
	Read TArray object from buffer. More...
static void	WriteArray (TBuffer &b, const TArray *a)
	Write TArray object to buffer. More...

Protected Member Functions
virtual Int_t	BufferFill (Double_t, Double_t)
	accumulate arguments in buffer. More...
virtual Int_t	BufferFill (Double_t x, Double_t y, Double_t w)
	accumulate arguments in buffer. More...
void	SetBins (const Int_t *nbins, const Double_t *range)
Int_t	Fill (const Double_t *v)
virtual Double_t	RetrieveBinContent (Int_t bin) const
virtual Double_t	GetBinErrorSqUnchecked (Int_t bin) const
Protected Member Functions inherited from TH1D
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 More...
Protected Member Functions inherited from TH1
	TH1 ()
	TH1 (const char *name, const char *title, Int_t nbinsx, Double_t xlow, Double_t xup)
	Normal constructor for fix bin size histograms. More...
	TH1 (const char *name, const char *title, Int_t nbinsx, const Float_t *xbins)
	Normal constructor for variable bin size histograms. More...
	TH1 (const char *name, const char *title, Int_t nbinsx, const Double_t *xbins)
	Normal constructor for variable bin size histograms. More...
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). More...
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. More...
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) More...
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 More...
Protected Member Functions inherited from TObject
void	MakeZombie ()
virtual void	DoError (int level, const char *location, const char *fmt, va_list va) const
	Interface to ErrorHandler (protected). More...
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

Protected Attributes
TArrayD	fBinEntries
EErrorType	fErrorMode
Double_t	fYmin
Double_t	fYmax
Bool_t	fScaling
Double_t	fTsumwy
	True when TProfile::Scale is called. More...
Double_t	fTsumwy2
TArrayD	fBinSumw2
Protected Attributes inherited from TH1
Int_t	fNcells
TAxis	fXaxis
TAxis	fYaxis
TAxis	fZaxis
Short_t	fBarOffset
Short_t	fBarWidth
Double_t	fEntries
Double_t	fTsumw
Double_t	fTsumw2
Double_t	fTsumwx
Double_t	fTsumwx2
Double_t	fMaximum
Double_t	fMinimum
Double_t	fNormFactor
TArrayD	fContour
TArrayD	fSumw2
TString	fOption
TList *	fFunctions
Int_t	fBufferSize
Double_t *	fBuffer
TDirectory *	fDirectory
Int_t	fDimension
	Pointer to directory holding this histogram. More...
Double_t *	fIntegral
	Histogram dimension (1, 2 or 3 dim) More...
TVirtualHistPainter *	fPainter
	Integral of bins used by GetRandom. More...
EBinErrorOpt	fBinStatErrOpt
	pointer to histogram painter More...
Protected Attributes inherited from TNamed
TString	fName
TString	fTitle
Protected Attributes inherited from TAttLine
Color_t	fLineColor
Style_t	fLineStyle
Width_t	fLineWidth
Protected Attributes inherited from TAttFill
Color_t	fFillColor
Style_t	fFillStyle
Protected Attributes inherited from TAttMarker
Color_t	fMarkerColor
Style_t	fMarkerStyle
Size_t	fMarkerSize

Static Protected Attributes
static Bool_t	fgApproximate = kFALSE
Static Protected Attributes inherited from TH1
static Int_t	fgBufferSize = 1000
static Bool_t	fgAddDirectory = kTRUE
	default buffer size for automatic histograms More...
static Bool_t	fgStatOverflows = kFALSE
	flag to add histograms to the directory More...
static Bool_t	fgDefaultSumw2 = kFALSE
	flag to use under/overflows in statistics More...

Private Member Functions
Int_t	Fill (Double_t)
	Increment bin with abscissa X by 1. More...
void	FillN (Int_t, const Double_t *, const Double_t *, Int_t)
	Fill this histogram with an array x and weights w. More...
Double_t *	GetB ()
Double_t *	GetB2 ()
Double_t *	GetW ()
Double_t *	GetW2 ()
void	SetBins (Int_t, Double_t, Double_t, Int_t, Double_t, Double_t)
	Redefine x and y axis parameters. More...
void	SetBins (Int_t, const Double_t *, Int_t, const Double_t *)
	Redefine x and y axis parameters with variable bin sizes. More...
void	SetBins (Int_t, Double_t, Double_t, Int_t, Double_t, Double_t, Int_t, Double_t, Double_t)
	Redefine x, y and z axis parameters. More...
void	SetBins (Int_t, const Double_t *, Int_t, const Double_t *, Int_t, const Double_t *)
	Redefine x, y and z axis parameters with variable bin sizes. More...

Friends
class	TProfileHelper

Additional Inherited Members
Public Types inherited from TH1
enum	EBinErrorOpt { kNormal = 0, kPoisson = 1, kPoisson2 = 2 }
enum	{   kNoAxis = 0, kXaxis = BIT(0), kYaxis = BIT(1), kZaxis = BIT(2),   kAllAxes = kXaxis | kYaxis | kZaxis }
enum	{   kNoStats = BIT(9), kUserContour = BIT(10), kLogX = BIT(15), kIsZoomed = BIT(16),   kNoTitle = BIT(17), kIsAverage = BIT(18), kIsNotW = BIT(19) }
enum	{ kNstat = 13 }
Public Types inherited from TObject
enum	EStatusBits {   kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4),   kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }
enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }
enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
Public Attributes inherited from TH1D
const TH1D &	h1
Public Attributes inherited from TArrayD
Double_t *	fArray
Public Attributes inherited from TArray
Int_t	fN
Static Protected Member Functions inherited from TH1
static Bool_t	RecomputeAxisLimits (TAxis &destAxis, const TAxis &anAxis)
	Finds new limits for the axis for the Merge function. More...
static Bool_t	SameLimitsAndNBins (const TAxis &axis1, const TAxis &axis2)
	Same limits and bins. More...
static bool	CheckAxisLimits (const TAxis *a1, const TAxis *a2)
	Check that the axis limits of the histograms are the same if a first and last bin is passed the axis is compared between the given range. More...
static bool	CheckBinLimits (const TAxis *a1, const TAxis *a2)
static bool	CheckBinLabels (const TAxis *a1, const TAxis *a2)
	check that axis have same labels More...
static bool	CheckEqualAxes (const TAxis *a1, const TAxis *a2)
	Check that the axis are the same. More...
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 the limits are defined by first bin and last bin N.B. More...
static bool	CheckConsistency (const TH1 *h1, const TH1 *h2)
	Check histogram compatibility. More...

#include <TProfile.h>

Inheritance diagram for TProfile:

Constructor & Destructor Documentation

TProfile::TProfile

(

)

TProfile::TProfile	(	const char *	name,
		const char *	title,
		Int_t	nbins,
		Double_t	xlow,
		Double_t	xup,
		Option_t *	option = ""
	)

Normal Constructor for Profile histograms The first five parameters are similar to TH1D::TH1D.

All values of y are accepted at filling time. To fill a profile histogram, one must use TProfile::Fill function.

Note that when filling the profile histogram the function Fill checks if the variable y is betyween fYmin and fYmax. If a minimum or maximum value is set for the Y scale before filling, then all values below ymin or above ymax will be discarded. Setting the minimum or maximum value for the Y scale before filling has the same effect as calling the special TProfile constructor below where ymin and ymax are specified.

H(J) is printed as the channel contents. The errors displayed are s(J) if CHOPT='S' (spread option), or e(J) if CHOPT=' ' (error on mean).

See TProfile::BuildOptions for explanation of parameters

see also comments in the TH1 base class constructors

Definition at line 116 of file TProfile.cxx.

TProfile::TProfile	(	const char *	name,
		const char *	title,
		Int_t	nbins,
		Double_t	xlow,
		Double_t	xup,
		Double_t	ylow,
		Double_t	yup,
		Option_t *	option = ""
	)

Constructor for Profile histograms with range in y The first five parameters are similar to TH1D::TH1D.

Only the values of Y between ylow and yup will be considered at filling time. ylow and yup will also be the maximum and minimum values on the y scale when drawing the profile.

See TProfile::BuildOptions for more explanations on errors

see also comments in the TH1 base class constructors

Definition at line 167 of file TProfile.cxx.

TProfile::TProfile	(	const char *	name,
		const char *	title,
		Int_t	nbinsx,
		const Float_t *	xbins,
		Option_t *	option = ""
	)

Constructor for Profile histograms with variable bin size See TProfile::BuildOptions for more explanations on errors see also comments in the TH1 base class constructors.

Definition at line 127 of file TProfile.cxx.

TProfile::TProfile	(	const char *	name,
		const char *	title,
		Int_t	nbinsx,
		const Double_t *	xbins,
		Option_t *	option = ""
	)

Constructor for Profile histograms with variable bin size See TProfile::BuildOptions for more explanations on errors see also comments in the TH1 base class constructors.

Definition at line 138 of file TProfile.cxx.

TProfile::TProfile	(	const char *	name,
		const char *	title,
		Int_t	nbins,
		const Double_t *	xbins,
		Double_t	ylow,
		Double_t	yup,
		Option_t *	option = ""
	)

Constructor for Profile histograms with variable bin size See TProfile::BuildOptions for more explanations on errors.

see also comments in the TH1 base class constructors

Definition at line 150 of file TProfile.cxx.

TProfile::TProfile

(

const TProfile &

profile

)

Copy constructor.

Definition at line 232 of file TProfile.cxx.

TProfile::~TProfile ( )

virtual

Default destructor for Profile histograms.

Definition at line 91 of file TProfile.cxx.

Member Function Documentation

Bool_t TProfile::Add ( TF1 *  h1, Double_t  c1 = 1, Option_t *  option = ""  )

virtual

Performs the operation: this = this + c1*f1.

Reimplemented from TH1.

Definition at line 241 of file TProfile.cxx.

Bool_t TProfile::Add ( const TH1 *  h1, Double_t  c1 = 1  )

virtual

Performs the operation: this = this + c1*h1.

Reimplemented from TH1.

Definition at line 251 of file TProfile.cxx.

Bool_t TProfile::Add ( const TH1 *  h1, const TH1 *  h2, Double_t  c1 = 1, Double_t  c2 = 1  )

virtual

Replace contents of this profile by the addition of h1 and h2 this = c1*h1 + c2*h2.

c1 and c2 are considered as weights applied to the two summed profiles. The operation acts therefore like merging the two profiles with a weight c1 and c2

Reimplemented from TH1.

Definition at line 272 of file TProfile.cxx.

void TProfile::Approximate ( Bool_t  approx = kTRUE )

static

static function set the fgApproximate flag.

When the flag is true, the function GetBinError will approximate the bin error with the average profile error on all bins in the following situation only

• the number of bins in the profile is less than 1002
• the bin number of entries is small ( <5)
• the estimated bin error is extremely small compared to the bin content (see TProfile::GetBinError)

Definition at line 300 of file TProfile.cxx.

Int_t TProfile::BufferEmpty ( Int_t  action = 0 )

virtual

Fill histogram with all entries in the buffer.

• action = -1 histogram is reset and refilled from the buffer (called by THistPainter::Paint)
• action = 0 histogram is filled from the buffer
• action = 1 histogram is filled and buffer is deleted The buffer is automatically deleted when the number of entries in the buffer is greater than the number of entries in the histogram

Reimplemented from TH1.

Definition at line 313 of file TProfile.cxx.

Referenced by BufferFill(), Divide(), and SetBuffer().

virtual Int_t TProfile::BufferFill ( Double_t  x, Double_t  w  )

inlineprotectedvirtual

accumulate arguments in buffer.

When buffer is full, empty the buffer fBuffer[0] = number of entries in buffer fBuffer[1] = w of first entry fBuffer[2] = x of first entry

Reimplemented from TH1.

Definition at line 51 of file TProfile.h.

Referenced by Fill(), and FillN().

Int_t TProfile::BufferFill ( Double_t  x, Double_t  y, Double_t  w  )

protectedvirtual

accumulate arguments in buffer.

When buffer is full, empty the buffer

• fBuffer[0] = number of entries in buffer
• fBuffer[1] = w of first entry
• fBuffer[2] = x of first entry
• fBuffer[3] = y of first entry

Definition at line 370 of file TProfile.cxx.

void TProfile::BuildOptions	(	Double_t	ymin,
		Double_t	ymax,
		Option_t *	option
	)

Set Profile histogram structure and options.

Parameters

[in]	ymin	minimum value allowed for y
[in]	ymax	maximum value allowed for y if (ymin = ymax = 0) there are no limits on the allowed y values (ymin = -inf, ymax = +inf)
[in]	option	this is the option for the computation of the y error of the profile ( TProfile::GetBinError ) possible values for the options are: ' ' (Default) the bin errors are the standard error on the mean of Y = S(Y)/SQRT(N) where S(Y) is the standard deviation (RMS) of the Y data in the bin and N is the number of bin entries (from TProfile::GetBinEntries(ibin) ) (i.e the errors are the standard error on the bin content of the profile) 's' Errors are the standard deviation of Y, S(Y) 'i' Errors are S(Y)/SQRT(N) (standard error on the mean as in the default) The only difference is only when the standard deviation in Y is zero. In this case the error a standard deviation = 1/SQRT(12) is assumed and the error is 1./SQRT(12*N). This approximation assumes that the Y values are integer (e.g. ADC counts) and have an implicit uncertainty of y +/- 0.5. With the assumption that the probability that y takes any value between y-0.5 and y+0.5 is uniform, its standard error is 1/SQRT(12) 'g' Errors are 1./SQRT(W) where W is the sum of the weights for the bin J W is obtained as from TProfile::GetBinEntries(ibin) This errors corresponds to the standard deviation of weighted mean where each measurement Y is uncorrelated and has an error sigma, which is expressed in the weight used to fill the Profile: w = 1/sigma^2 The resulting error in TProfile is then 1./SQRT( Sum(1./sigma^2) )

Definition at line 200 of file TProfile.cxx.

Referenced by TProfile().

void TProfile::Copy ( TObject &  hnew ) const

virtual

Copy a Profile histogram to a new profile histogram.

Reimplemented from TH1D.

Definition at line 397 of file TProfile.cxx.

Bool_t TProfile::Divide ( TF1 *  h1, Double_t  c1 = 1  )

virtual

Performs the operation: this = this/(c1*f1) This function is not implemented for the TProfile.

Reimplemented from TH1.

Definition at line 427 of file TProfile.cxx.

Bool_t TProfile::Divide ( const TH1 *  h1 )

virtual

Divide this profile by h1 this = this/h1 This function accepts to divide a TProfile by a histogram.

The function return kFALSE if the divide operation failed

Reimplemented from TH1.

Definition at line 440 of file TProfile.cxx.

Bool_t TProfile::Divide ( const TH1 *  h1, const TH1 *  h2, Double_t  c1 = 1, Double_t  c2 = 1, Option_t *  option = ""  )

virtual

Replace contents of this profile by the division of h1 by h2 this = c1*h1/(c2*h2)

The function return kFALSE if the divide operation failed

Reimplemented from TH1.

Definition at line 519 of file TProfile.cxx.

void TProfile::ExtendAxis ( Double_t  x, TAxis *  axis  )

virtual

Profile histogram is resized along x axis such that x is in the axis range.

The new axis limits are recomputed by doubling iteratively the current axis range until the specified value x is within the limits. The algorithm makes a copy of the histogram, then loops on all bins of the old histogram to fill the extended histogram. Takes into account errors (Sumw2) if any. The axis must be extendable before invoking this function. Ex: h->GetXaxis()->SetCanExtend(kTRUE)

Reimplemented from TH1.

Definition at line 1487 of file TProfile.cxx.

Referenced by BufferEmpty().

Int_t TProfile::Fill ( const Double_t *  v )

inlineprotected

Definition at line 56 of file TProfile.h.

Referenced by BufferEmpty(), BufferFill(), THbookFile::ConvertProfile(), TH2::DoProfile(), Fill(), hsimple(), httpserver(), TProofBenchRunCPU::Run(), and TProofBenchRunDataRead::Run().

Int_t TProfile::Fill ( Double_t  x )

inlineprivatevirtual

Increment bin with abscissa X by 1.

if x is less than the low-edge of the first bin, the Underflow bin is incremented if x is greater than the upper edge of last bin, the Overflow bin is incremented

If the storage of the sum of squares of weights has been triggered, via the function Sumw2, then the sum of the squares of weights is incremented by 1 in the bin corresponding to x.

The function returns the corresponding bin number which has its content incremented by 1

Reimplemented from TH1.

Definition at line 63 of file TProfile.h.

Int_t TProfile::Fill ( Double_t  x, Double_t  y  )

virtual

Fill a Profile histogram (no weights)

Reimplemented from TH1.

Definition at line 622 of file TProfile.cxx.

Int_t TProfile::Fill ( const char *  namex, Double_t  y  )

virtual

Fill a Profile histogram (no weights)

Reimplemented from TH1.

Definition at line 653 of file TProfile.cxx.

Int_t TProfile::Fill ( Double_t  x, Double_t  y, Double_t  w  )

virtual

Fill a Profile histogram with weights.

Definition at line 682 of file TProfile.cxx.

Int_t TProfile::Fill ( const char *  namex, Double_t  y, Double_t  w  )

virtual

Fill a Profile histogram with weights.

Definition at line 715 of file TProfile.cxx.

void TProfile::FillN ( Int_t  ntimes, const Double_t *  x, const Double_t *  w, Int_t  stride  )

inlineprivatevirtual

Fill this histogram with an array x and weights w.

Parameters

[in]	ntimes	number of entries in arrays x and w (array size must be ntimes*stride)
[in]	x	array of values to be histogrammed
	in[	w array of weighs
[in]	stride	step size through arrays x and w

If the weight is not equal to 1, the storage of the sum of squares of weights is automatically triggered and the sum of the squares of weights is incremented y w^2 in the bin corresponding to x. if w is NULL each entry is assumed a weight=1

Reimplemented from TH1.

Definition at line 64 of file TProfile.h.

Referenced by TSelectorDraw::TakeEstimate().

void TProfile::FillN ( Int_t  ntimes, const Double_t *  x, const Double_t *  y, const Double_t *  w, Int_t  stride = 1  )

virtual

Fill a Profile histogram with weights.

Reimplemented from TH1.

Definition at line 748 of file TProfile.cxx.

Double_t* TProfile::GetB ( )

inlineprivate

Definition at line 65 of file TProfile.h.

Referenced by Divide(), and Rebin().

Double_t* TProfile::GetB2 ( )

inlineprivate

Definition at line 66 of file TProfile.h.

Referenced by Rebin().

Double_t TProfile::GetBinContent ( Int_t  bin ) const

virtual

Return bin content of a Profile histogram.

Reimplemented from TH1.

Definition at line 796 of file TProfile.cxx.

Referenced by TProofBench::DrawCPU(), TProofBench::DrawDataSet(), TProofBench::GetGraph(), ProjectionX(), TProofBenchRunCPU::Run(), and TProofBenchRunDataRead::Run().

virtual Double_t TProfile::GetBinContent ( Int_t  bin, Int_t    ) const

inlinevirtual

Reimplemented from TH1.

Definition at line 104 of file TProfile.h.

Referenced by GetBinContent().

virtual Double_t TProfile::GetBinContent ( Int_t  bin, Int_t  , Int_t    ) const

inlinevirtual

Reimplemented from TH1.

Definition at line 105 of file TProfile.h.

Referenced by GetBinContent().

Double_t TProfile::GetBinEffectiveEntries ( Int_t  bin ) const

virtual

Return bin effective entries for a weighted filled Profile histogram.

In case of an unweighted profile, it is equivalent to the number of entries per bin The effective entries is defined as the square of the sum of the weights divided by the sum of the weights square. TProfile::Sumw2() must be called before filling the profile with weights. Only by calling this method the sum of the square of the weights per bin is stored.

---

Definition at line 827 of file TProfile.cxx.

Double_t TProfile::GetBinEntries ( Int_t  bin ) const

virtual

Return bin entries of a Profile histogram.

Definition at line 809 of file TProfile.cxx.

Referenced by THistPainter::GetObjectInfo(), THistPainter::PaintText(), ProjectionX(), and SavePrimitive().

Double_t TProfile::GetBinError ( Int_t  bin ) const

virtual

Return bin error of a Profile histogram.

Computing errors: A moving field

The computation of errors for a TProfile has evolved with the versions of ROOT. The difficulty is in computing errors for bins with low statistics.

• prior to version 3.00, we had no special treatment of low statistic bins. As a result, these bins had huge errors. The reason is that the expression eprim2 is very close to 0 (rounding problems) or 0.
• in version 3.00 (18 Dec 2000), the algorithm is protected for values of eprim2 very small and the bin errors set to the average bin errors, following recommendations from a group of users.
• in version 3.01 (19 Apr 2001), it is realized that the algorithm above should be applied only to low statistic bins.
• in version 3.02 (26 Sep 2001), the same group of users recommend instead to take two times the average error on all bins for these low statistics bins giving a very small value for eprim2.
• in version 3.04 (Nov 2002), the algorithm is modified/protected for the case when a TProfile is projected (ProjectionX). The previous algorithm generated a N^2 problem when projecting a TProfile with a large number of bins (eg 100000).
• in version 3.05/06, a new static function TProfile::Approximate is introduced to enable or disable (default) the approximation.

Ideas for improvements of this algorithm are welcome. No suggestions received since our call for advice to roottalk in Jul 2002. see for instance: http://root.cern.ch/root/roottalk/roottalk02/2916.html

Reimplemented from TH1.

Definition at line 861 of file TProfile.cxx.

Referenced by GetBinErrorSqUnchecked(), TProofBench::GetGraph(), ProjectionX(), TProofBenchRunCPU::Run(), and TProofBenchRunDataRead::Run().

virtual Double_t TProfile::GetBinError ( Int_t  bin, Int_t    ) const

inlinevirtual

Reimplemented from TH1.

Definition at line 107 of file TProfile.h.

Referenced by GetBinError().

virtual Double_t TProfile::GetBinError ( Int_t  bin, Int_t  , Int_t    ) const

inlinevirtual

Reimplemented from TH1.

Definition at line 108 of file TProfile.h.

Referenced by GetBinError().

virtual Double_t TProfile::GetBinErrorSqUnchecked ( Int_t  bin ) const

inlineprotectedvirtual

Reimplemented from TH1.

Definition at line 60 of file TProfile.h.

virtual TArrayD* TProfile::GetBinSumw2 ( )

inlinevirtual

Definition at line 111 of file TProfile.h.

Referenced by TProfile2D::DoProfile(), and TH2::DoProfile().

virtual const TArrayD* TProfile::GetBinSumw2 ( ) const

inlinevirtual

Definition at line 112 of file TProfile.h.

Option_t * TProfile::GetErrorOption

(

)

const

Return option to compute profile errors.

Definition at line 869 of file TProfile.cxx.

Referenced by SavePrimitive().

void TProfile::GetStats ( Double_t *  stats ) const

virtual

fill the array stats from the contents of this profile The array stats must be correctly dimensionned in the calling program.

stats[0] = sumw stats[1] = sumw2 stats[2] = sumwx stats[3] = sumwx2 stats[4] = sumwy stats[5] = sumwy2

If no axis-subrange is specified (via TAxis::SetRange), the array stats is simply a copy of the statistics quantities computed at filling time. If a sub-range is specified, the function recomputes these quantities from the bin contents in the current axis range.

Reimplemented from TH1.

Definition at line 892 of file TProfile.cxx.

Double_t* TProfile::GetW ( )

inlineprivate

Definition at line 67 of file TProfile.h.

Referenced by Divide(), and Rebin().

Double_t* TProfile::GetW2 ( )

inlineprivate

Definition at line 68 of file TProfile.h.

Referenced by Divide(), and Rebin().

virtual Double_t TProfile::GetYmax ( ) const

inlinevirtual

Definition at line 116 of file TProfile.h.

virtual Double_t TProfile::GetYmin ( ) const

inlinevirtual

Definition at line 115 of file TProfile.h.

void TProfile::LabelsDeflate ( Option_t *  axis = "X" )

virtual

Reduce the number of bins for this axis to the number of bins having a label.

Reimplemented from TH1.

Definition at line 940 of file TProfile.cxx.

void TProfile::LabelsInflate ( Option_t *  options = "X" )

virtual

Double the number of bins for axis.

Refill histogram This function is called by TAxis::FindBin(const char *label)

Reimplemented from TH1.

Definition at line 950 of file TProfile.cxx.

void TProfile::LabelsOption ( Option_t *  option = "h", Option_t *  axis = "X"  )

virtual

Set option(s) to draw axis with labels option = "a" sort by alphabetic order = ">" sort by decreasing values = "<" sort by increasing values = "h" draw labels horizonthal = "v" draw labels vertical = "u" draw labels up (end of label right adjusted) = "d" draw labels down (start of label left adjusted)

Reimplemented from TH1.

Definition at line 965 of file TProfile.cxx.

Long64_t TProfile::Merge ( TCollection *  li )

virtual

Merge all histograms in the collection in this histogram.

This function computes the min/max for the x axis, compute a new number of bins, if necessary, add bin contents, errors and statistics. If overflows are present and limits are different the function will fail. The function returns the total number of entries in the result histogram if the merge is successfull, -1 otherwise.

IMPORTANT remark. The axis x may have different number of bins and different limits, BUT the largest bin width must be a multiple of the smallest bin width and the upper limit must also be a multiple of the bin width.

Reimplemented from TH1.

Definition at line 1102 of file TProfile.cxx.

Bool_t TProfile::Multiply ( TF1 *  f1, Double_t  c1 = 1  )

virtual

Performs the operation: this = this*c1*f1.

The function return kFALSE if the Multiply operation failed

Reimplemented from TH1.

Definition at line 1113 of file TProfile.cxx.

Bool_t TProfile::Multiply ( const TH1 *  h1 )

virtual

Multiply this profile by h1.

this = this*h1

Reimplemented from TH1.

Definition at line 1155 of file TProfile.cxx.

Bool_t TProfile::Multiply ( const TH1 *  h1, const TH1 *  h2, Double_t  c1 = 1, Double_t  c2 = 1, Option_t *  option = ""  )

virtual

Replace contents of this profile by multiplication of h1 by h2.

this = (c1*h1)*(c2*h2)

Reimplemented from TH1.

Definition at line 1167 of file TProfile.cxx.

TH1D * TProfile::ProjectionX	(	const char *	name = "_px",
		Option_t *	option = "e"
	)		const

Project this profile into a 1-D histogram along X.

The projection is always of the type TH1D.

• if option "E" is specified the errors of the projected histogram are computed and set to be equal to the errors of the profile. Option "E" is defined as the default one in the header file.
• if option "" is specified the histogram errors are simply the sqrt of its content
• if option "B" is specified, the content of bin of the returned histogram will be equal to the GetBinEntries(bin) of the profile, otherwise (default) it will be equal to GetBinContent(bin)
• if option "C=E" the bin contents of the projection are set to the bin errors of the profile
• if option "W" is specified the bin content of the projected histogram is set to the product of the bin content of the profile and the entries. With this option the returned histogram will be equivalent to the one obtained by filling directly a TH1D using the 2-nd value as a weight. This makes sense only for profile filled with weights =1. If not, the error of the projected histogram obtained with this option will not be correct.

Definition at line 1194 of file TProfile.cxx.

void TProfile::PutStats ( Double_t *  stats )

virtual

Replace current statistics with the values in array stats.

Reimplemented from TH1.

Definition at line 1269 of file TProfile.cxx.

Referenced by Multiply().

TH1 * TProfile::Rebin ( Int_t  ngroup = 2, const char *  newname = "", const Double_t *  xbins = 0  )

virtual

Rebin this profile grouping ngroup bins together

case 1 xbins=0

if newname is not blank a new temporary profile hnew is created.

else the current profile is modified (default) The parameter ngroup indicates how many bins of this have to me merged into one bin of hnew If the original profile has errors stored (via Sumw2), the resulting profile has new errors correctly calculated.

examples: if hp is an existing TProfile histogram with 100 bins hp->Rebin(); //merges two bins in one in hp: previous contents of hp are lost hp->Rebin(5); //merges five bins in one in hp TProfile *hnew = hp->Rebin(5,"hnew"); // creates a new profile hnew //merging 5 bins of hp in one bin

NOTE: If ngroup is not an exact divider of the number of bins, the top limit of the rebinned profile is changed to the upper edge of the bin=newbins*ngroup and the corresponding bins are added to the overflow bin. Statistics will be recomputed from the new bin contents.

case 2 xbins!=0

a new profile is created (you should specify newname). The parameter ngroup is the number of variable size bins in the created profile The array xbins must contain ngroup+1 elements that represent the low-edge of the bins. The data of the old bins are added to the new bin which contains the bin center of the old bins. It is possible that information from the old binning are attached to the under-/overflow bins of the new binning.

examples: if hp is an existing TProfile with 100 bins

Double_t xbins[25] = {...} array of low-edges (xbins[25] is the upper edge of last bin
hp->Rebin(24,"hpnew",xbins);  //creates a new variable bin size profile hpnew  

Reimplemented from TH1.

Definition at line 1315 of file TProfile.cxx.

void TProfile::Reset ( Option_t *  option = "" )

virtual

Reset contents of a Profile histogram.

Reimplemented from TH1D.

Definition at line 1501 of file TProfile.cxx.

Referenced by TH2::DoProfile().

virtual Double_t TProfile::RetrieveBinContent ( Int_t  bin ) const

inlineprotectedvirtual

Reimplemented from TH1D.

Definition at line 58 of file TProfile.h.

void TProfile::SavePrimitive ( std::ostream &  out, Option_t *  option = ""  )

virtual

Save primitive as a C++ statement(s) on output stream out.

Reimplemented from TH1.

Definition at line 1516 of file TProfile.cxx.

void TProfile::Scale ( Double_t  c1 = 1, Option_t *  option = ""  )

virtual

Multiply this profile by a constant c1.

this = c1*this

This function uses the services of TProfile::Add

Reimplemented from TH1.

Definition at line 1597 of file TProfile.cxx.

void TProfile::SetBinEntries ( Int_t  bin, Double_t  w  )

virtual

Set the number of entries in bin.

Definition at line 1605 of file TProfile.cxx.

Referenced by TProfile2D::DoProfile().

void TProfile::SetBins ( const Int_t *  nbins, const Double_t *  range  )

inlineprotected

Definition at line 55 of file TProfile.h.

Referenced by TH2::DoProfile(), Rebin(), and SetBins().

void TProfile::SetBins ( Int_t  nx, Double_t  xmin, Double_t  xmax, Int_t  ny, Double_t  ymin, Double_t  ymax  )

inlineprivatevirtual

Redefine x and y axis parameters.

The X and Y axis parameters are modified. The bins content array is resized if errors (Sumw2) the errors array is resized The previous bin contents are lost To change only the axis limits, see TAxis::SetRange

Reimplemented from TH1.

Definition at line 69 of file TProfile.h.

void TProfile::SetBins ( Int_t  nx, const Double_t *  xBins, Int_t  ny, const Double_t *  yBins  )

inlineprivatevirtual

Redefine x and y axis parameters with variable bin sizes.

The X and Y axis parameters are modified. The bins content array is resized if errors (Sumw2) the errors array is resized The previous bin contents are lost To change only the axis limits, see TAxis::SetRange xBins is supposed to be of length nx+1, yBins is supposed to be of length ny+1

Reimplemented from TH1.

Definition at line 71 of file TProfile.h.

void TProfile::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  )

inlineprivatevirtual

Redefine x, y and z axis parameters.

The X, Y and Z axis parameters are modified. The bins content array is resized if errors (Sumw2) the errors array is resized The previous bin contents are lost To change only the axis limits, see TAxis::SetRange

Reimplemented from TH1.

Definition at line 73 of file TProfile.h.

void TProfile::SetBins ( Int_t  nx, const Double_t *  xBins, Int_t  ny, const Double_t *  yBins, Int_t  nz, const Double_t *  zBins  )

inlineprivatevirtual

Redefine x, y and z axis parameters with variable bin sizes.

The X, Y and Z axis parameters are modified. The bins content array is resized if errors (Sumw2) the errors array is resized The previous bin contents are lost To change only the axis limits, see TAxis::SetRange xBins is supposed to be of length nx+1, yBins is supposed to be of length ny+1, zBins is supposed to be of length nz+1

Reimplemented from TH1.

Definition at line 75 of file TProfile.h.

void TProfile::SetBins ( Int_t  nbins, Double_t  xmin, Double_t  xmax  )

virtual

Redefine x axis parameters.

Reimplemented from TH1.

Definition at line 1613 of file TProfile.cxx.

void TProfile::SetBins ( Int_t  nx, const Double_t *  xbins  )

virtual

Redefine x axis parameters.

Reimplemented from TH1.

Definition at line 1623 of file TProfile.cxx.

void TProfile::SetBinsLength ( Int_t  n = -1 )

virtual

Set total number of bins including under/overflow Reallocate bin contents array.

Reimplemented from TH1D.

Definition at line 1634 of file TProfile.cxx.

Referenced by SetBins().

void TProfile::SetBuffer ( Int_t  buffersize, Option_t *  option = ""  )

virtual

set the buffer size in units of 8 bytes (double)

Reimplemented from TH1.

Definition at line 1643 of file TProfile.cxx.

void TProfile::SetErrorOption ( Option_t *  option = "" )

virtual

Set option to compute profile errors.

The computation of the bin errors is based on the parameter option: option: -' ' (Default) The bin errors are the standard error on the mean of the bin profiled values (Y), i.e. the standard error of the bin contents. Note that if TProfile::Approximate() is called, an approximation is used when the spread in Y is 0 and the number of bin entries is > 0 -'s' The bin errors are the standard deviations of the Y bin values Note that if TProfile::Approximate() is called, an approximation is used when the spread in Y is 0 and the number of bin entries is > 0 -'i' Errors are as in default case (standard errors of the bin contents) The only difference is for the case when the spread in Y is zero. In this case for N > 0 the error is 1./SQRT(12.*N) -'g' Errors are 1./SQRT(W) for W not equal to 0 and 0 for W = 0. W is the sum in the bin of the weights of the profile. This option is for combining measurements y +/- dy, and the profile is filled with values y and weights w = 1/dy**2

See TProfile::BuildOptions for a detailed explanation of all options

Definition at line 1682 of file TProfile.cxx.

Referenced by BuildOptions().

void TProfile::Sumw2 ( Bool_t  flag = kTRUE )

virtual

Create/delete structure to store sum of squares of weights per bin — This is needed to compute the correct statistical quantities of a profile filled with weights.

This function is automatically called when the histogram is created if the static function TH1::SetDefaultSumw2 has been called before. If flag is false the structure is deleted

Reimplemented from TH1.

Definition at line 1730 of file TProfile.cxx.

Referenced by TProfile2D::DoProfile(), TH2::DoProfile(), Fill(), FillN(), and Rebin().

Friends And Related Function Documentation

friend class TProfileHelper

friend

Definition at line 37 of file TProfile.h.

Member Data Documentation

TArrayD TProfile::fBinEntries

protected

Definition at line 40 of file TProfile.h.

Referenced by Copy(), Divide(), Fill(), FillN(), GetB(), GetBinContent(), GetBinEntries(), GetStats(), LabelsOption(), Rebin(), Reset(), and RetrieveBinContent().

TArrayD TProfile::fBinSumw2

protected

Definition at line 47 of file TProfile.h.

Referenced by Copy(), Divide(), Fill(), FillN(), GetB2(), GetBinSumw2(), GetStats(), ProjectionX(), Rebin(), and Reset().

EErrorType TProfile::fErrorMode

protected

Definition at line 41 of file TProfile.h.

Referenced by Copy(), and GetErrorOption().

Bool_t TProfile::fgApproximate = kFALSE

staticprotected

Definition at line 49 of file TProfile.h.

Referenced by Approximate().

Bool_t TProfile::fScaling

protected

Definition at line 44 of file TProfile.h.

Referenced by BuildOptions(), and Copy().

Double_t TProfile::fTsumwy

protected

True when TProfile::Scale is called.

Definition at line 45 of file TProfile.h.

Referenced by BuildOptions(), Copy(), Divide(), ExtendAxis(), Fill(), FillN(), GetStats(), PutStats(), and Reset().

Double_t TProfile::fTsumwy2

protected

Definition at line 46 of file TProfile.h.

Referenced by BuildOptions(), Copy(), Divide(), ExtendAxis(), Fill(), FillN(), GetStats(), PutStats(), and Reset().

Double_t TProfile::fYmax

protected

Definition at line 43 of file TProfile.h.

Referenced by BuildOptions(), Copy(), Fill(), FillN(), and GetYmax().

Double_t TProfile::fYmin

protected

Definition at line 42 of file TProfile.h.

Referenced by BuildOptions(), Copy(), Fill(), FillN(), and GetYmin().

Collaboration diagram for TProfile:

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The documentation for this class was generated from the following files:

• hist/hist/inc/TProfile.h
• hist/hist/src/TProfile.cxx