Logo ROOT   6.21/01
Reference Guide
THn Class Referenceabstract

Multidimensional histogram.

Use a THn if you really, really have to store more than three dimensions, and if a large fraction of all bins are filled. Better alternatives are

The major problem of THn is the memory use caused by n-dimensional histogramming: a THnD with 8 dimensions and 100 bins per dimension needs more than 2.5GB of RAM!

To construct a THn object you must use one of its templated, derived classes:

THnD (typedef for THnT<Double_t>): bin content held by a Double_t,
THnF (typedef for THnT<Float_t>): bin content held by a Float_t,
THnL (typedef for THnT<Long_t>): bin content held by a Long_t,
THnI (typedef for THnT<Int_t>): bin content held by an Int_t,
THnS (typedef for THnT<Short_t>): bin content held by a Short_t,
THnC (typedef for THnT<Char_t>): bin content held by a Char_t,

They take name and title, the number of dimensions, and for each dimension the number of bins, the minimal, and the maximal value on the dimension's axis. A TH2F h("h","h",10, 0., 10., 20, -5., 5.) would correspond to

Int_t bins[2] = {10, 20};
Double_t xmin[2] = {0., -5.};
Double_t xmax[2] = {10., 5.};
THnF hn("hn", "hn", 2, bins, xmin, xmax);

Filling

A THn is filled just like a regular histogram, using THn::Fill(x, weight), where x is a n-dimensional Double_t value. To take errors into account, Sumw2() must be called before filling the histogram. Storage is allocated when the first bin content is stored.

Projections

The dimensionality of a THn can be reduced by projecting it to 1, 2, 3, or n dimensions, which can be represented by a TH1, TH2, TH3, or a THn. See the Projection() members. To only project parts of the histogram, call

hn->GetAxis(12)->SetRange(from_bin, to_bin);

Conversion from other histogram classes

The static factory function THn::CreateHn() can be used to create a THn from a TH1, TH2, TH3, THnSparse and (for copying) even from a THn. The created THn will have compatble storage type, i.e. calling CreateHn() on a TH2F will create a THnF.

Definition at line 36 of file THn.h.

Public Member Functions

virtual ~THn ()
 Destruct a THn. More...
 
void AddBinContent (const Int_t *idx, Double_t v=1.)
 
void AddBinContent (Long64_t bin, Double_t v=1.)
 
void AddBinError2 (Long64_t bin, Double_t e2)
 
ROOT::Internal::THnBaseBinIterCreateIter (Bool_t respectAxisRange) const
 Create an iterator over all bins. Public interface is THnIter. More...
 
void FillBin (Long64_t bin, Double_t w)
 
virtual const TNDArrayGetArray () const =0
 
virtual TNDArrayGetArray ()=0
 
Long64_t GetBin (const Int_t *idx) const
 
Long64_t GetBin (const Double_t *x) const
 
Long64_t GetBin (const char *name[]) const
 
Long64_t GetBin (const Int_t *idx, Bool_t=kTRUE)
 
Long64_t GetBin (const Double_t *x, Bool_t=kTRUE)
 
Long64_t GetBin (const char *name[], Bool_t=kTRUE)
 
Double_t GetBinContent (const Int_t *idx) const
 
Double_t GetBinContent (Long64_t bin, Int_t *idx=0) const
 
Double_t GetBinError2 (Long64_t linidx) const
 
Long64_t GetNbins () const
 
TH1DProjection (Int_t xDim, Option_t *option="") const
 
TH2DProjection (Int_t yDim, Int_t xDim, Option_t *option="") const
 
TH3DProjection (Int_t xDim, Int_t yDim, Int_t zDim, Option_t *option="") const
 
THnProjection (Int_t ndim, const Int_t *dim, Option_t *option="") const
 
THnRebin (Int_t group) const
 
THnRebin (const Int_t *group) const
 
void Reset (Option_t *option="")
 Reset the contents of a THn. More...
 
void SetBinContent (const Int_t *idx, Double_t v)
 
void SetBinContent (Long64_t bin, Double_t v)
 
void SetBinError2 (Long64_t bin, Double_t e2)
 
void Sumw2 ()
 Enable calculation of errors. More...
 
- Public Member Functions inherited from THnBase
virtual ~THnBase ()
 Destruct a THnBase. More...
 
void Add (const THnBase *h, Double_t c=1.)
 Add contents of h scaled by c to this histogram: this = this + c * h Note that if h has Sumw2 set, Sumw2 is automatically called for this if not already set. More...
 
void Add (const TH1 *hist, Double_t c=1.)
 Fill the THnBase with the bins of hist that have content or error != 0. More...
 
void AddBinContent (const Int_t *x, Double_t v=1.)
 
void Browse (TBrowser *b)
 Browse a THnSparse: create an entry (ROOT::THnSparseBrowsable) for each dimension. More...
 
void CalculateErrors (Bool_t calc=kTRUE)
 Calculate errors (or not if "calc" == kFALSE) More...
 
Double_t ComputeIntegral ()
 Calculate the integral of the histogram. More...
 
void Divide (const THnBase *h)
 Divide this histogram by h this = this/(h) Note that if h has Sumw2 set, Sumw2 is automatically called for this if not already set. More...
 
void Divide (const THnBase *h1, const THnBase *h2, Double_t c1=1., Double_t c2=1., Option_t *option="")
 Replace contents of this histogram by multiplication of h1 by h2 this = (c1*h1)/(c2*h2) Note that if h1 or h2 have Sumw2 set, Sumw2 is automatically called for this if not already set. More...
 
Long64_t Fill (const Double_t *x, Double_t w=1.)
 
Long64_t Fill (const char *name[], Double_t w=1.)
 
TFitResultPtr Fit (TF1 *f1, Option_t *option="", Option_t *goption="")
 Fit a THnSparse with function f. More...
 
TAxisGetAxis (Int_t dim) const
 
Double_t GetBinContent (const Int_t *idx) const
 
Double_t GetBinError (const Int_t *idx) const
 
Double_t GetBinError (Long64_t linidx) const
 
Bool_t GetCalculateErrors () const
 
Double_t GetEntries () const
 
TObjArrayGetListOfAxes ()
 
const TObjArrayGetListOfAxes () const
 
TListGetListOfFunctions ()
 
Int_t GetNdimensions () const
 
void GetRandom (Double_t *rand, Bool_t subBinRandom=kTRUE)
 Generate an n-dimensional random tuple based on the histogrammed distribution. More...
 
Double_t GetSumw () const
 
Double_t GetSumw2 () const
 
Double_t GetSumwx (Int_t dim) const
 
Double_t GetSumwx2 (Int_t dim) const
 
Double_t GetWeightSum () const
 
Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
Bool_t IsInRange (Int_t *coord) const
 Check whether bin coord is in range, as defined by TAxis::SetRange(). More...
 
Long64_t Merge (TCollection *list)
 Merge this with a list of THnBase's. More...
 
void Multiply (const THnBase *h)
 Multiply this histogram by histogram h this = this * h Note that if h has Sumw2 set, Sumw2 is automatically called for this if not already set. More...
 
void Multiply (TF1 *f, Double_t c=1.)
 Performs the operation: this = this*c*f1 if errors are defined, errors are also recalculated. More...
 
void Print (Option_t *option="") const
 Print a THnBase. More...
 
void PrintBin (Int_t *coord, Option_t *options) const
 
void PrintBin (Long64_t idx, Option_t *options) const
 Print bin with linex index "idx". More...
 
void PrintEntries (Long64_t from=0, Long64_t howmany=-1, Option_t *options=0) const
 Print "howmany" entries starting at "from". More...
 
TH1DProjection (Int_t xDim, Option_t *option="") const
 Project all bins into a 1-dimensional histogram, keeping only axis "xDim". More...
 
TH2DProjection (Int_t yDim, Int_t xDim, Option_t *option="") const
 Project all bins into a 2-dimensional histogram, keeping only axes "xDim" and "yDim". More...
 
TH3DProjection (Int_t xDim, Int_t yDim, Int_t zDim, Option_t *option="") const
 Project all bins into a 3-dimensional histogram, keeping only axes "xDim", "yDim", and "zDim". More...
 
THnBaseProjectionND (Int_t ndim, const Int_t *dim, Option_t *option="") const
 
void RebinnedAdd (const THnBase *h, Double_t c=1.)
 Add contents of h scaled by c to this histogram: this = this + c * h Note that if h has Sumw2 set, Sumw2 is automatically called for this if not already set. More...
 
void Scale (Double_t c)
 Scale contents and errors of this histogram by c: this = this * c It does not modify the histogram's number of entries. More...
 
void SetBinContent (const Int_t *idx, Double_t v)
 
void SetBinEdges (Int_t idim, const Double_t *bins)
 Set the axis # of bins and bin limits on dimension idim. More...
 
void SetBinError (const Int_t *idx, Double_t e)
 
void SetBinError (Long64_t bin, Double_t e)
 
void SetEntries (Double_t entries)
 
void SetTitle (const char *title)
 Change (i.e. More...
 
- 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 copy ctor. More...
 
virtual ~TNamed ()
 TNamed destructor. More...
 
virtual void Clear (Option_t *option="")
 Set name and title to empty strings (""). More...
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility. More...
 
virtual Int_t Compare (const TObject *obj) const
 Compare two TNamed objects. More...
 
virtual void Copy (TObject &named) const
 Copy this to obj. 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...
 
TNamedoperator= (const TNamed &rhs)
 TNamed assignment operator. More...
 
virtual void SetName (const char *name)
 Set the name of the TNamed. More...
 
virtual void SetNameTitle (const char *name, const char *title)
 Set all the TNamed parameters (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 constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. 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...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
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. 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 Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object. More...
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects. More...
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Dump () const
 Dump contents of object on stdout. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. 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 void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py). More...
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
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. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. 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...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
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). More...
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification. More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. More...
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself. 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 RecursiveRemove (TObject *obj)
 Recursively remove this object from a list. More...
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename. More...
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out". 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)
 
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 void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const
 
Int_t TestBits (UInt_t f) const
 
virtual void UseCurrentStyle ()
 Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. 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...
 

Static Public Member Functions

static THnCreateHn (const char *name, const char *title, const TH1 *h1)
 
static THnCreateHn (const char *name, const char *title, const THnBase *hn)
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 

Protected Member Functions

 THn ()
 
 THn (const char *name, const char *title, Int_t dim, const Int_t *nbins, const Double_t *xmin, const Double_t *xmax)
 Construct a THn. More...
 
void AllocCoordBuf () const
 Create the coordinate buffer. More...
 
void InitStorage (Int_t *nbins, Int_t chunkSize)
 Initialize the storage of a histogram created via Init() More...
 
- Protected Member Functions inherited from THnBase
 THnBase ()
 
 THnBase (const char *name, const char *title, Int_t dim, const Int_t *nbins, const Double_t *xmin, const Double_t *xmax)
 Construct a THnBase with "dim" dimensions, "nbins" holds the number of bins for each dimension; "xmin" and "xmax" the minimal and maximal value for each dimension. More...
 
void AddInternal (const THnBase *h, Double_t c, Bool_t rebinned)
 Add() implementation for both rebinned histograms and those with identical binning. More...
 
Bool_t CheckConsistency (const THnBase *h, const char *tag) const
 Consistency check on (some of) the parameters of two histograms (for operations). More...
 
THnBaseCloneEmpty (const char *name, const char *title, const TObjArray *axes, Bool_t keepTargetAxis) const
 Create a new THnBase object that is of the same type as *this, but with dimensions and bins given by axes. More...
 
TH1CreateHist (const char *name, const char *title, const TObjArray *axes, Bool_t keepTargetAxis) const
 Create an empty histogram with name and title with a given set of axes. More...
 
void FillBinBase (Double_t w)
 Increment the statistics due to filled weight "w",. More...
 
void Init (const char *name, const char *title, const TObjArray *axes, Bool_t keepTargetAxis, Int_t chunkSize=1024 *16)
 Initialize axes and name. More...
 
Bool_t PrintBin (Long64_t idx, Int_t *coord, Option_t *options) const
 Print one bin. More...
 
TObjectProjectionAny (Int_t ndim, const Int_t *dim, Bool_t wantNDim, Option_t *option="") const
 Project all bins into a ndim-dimensional THn / THnSparse (whatever *this is) or if (ndim < 4 and !wantNDim) a TH1/2/3 histogram, keeping only axes in dim (specifying ndim dimensions). More...
 
THnBaseRebinBase (Int_t group) const
 Combine the content of "group" neighboring bins into a new bin and return the resulting THnBase. More...
 
THnBaseRebinBase (const Int_t *group) const
 Combine the content of "group" neighboring bins for each dimension into a new bin and return the resulting THnBase. More...
 
virtual void Reserve (Long64_t)
 
void ResetBase (Option_t *option="")
 Clear the histogram. More...
 
virtual void SetFilledBins (Long64_t)
 
void UpdateXStat (const Double_t *x, Double_t w=1.)
 
- 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). More...
 
void MakeZombie ()
 

Protected Attributes

Int_tfCoordBuf
 
TNDArrayT< Double_tfSumw2
 
- Protected Attributes inherited from THnBase
TObjArray fAxes
 
TObjArray fBrowsables
 
Double_t fEntries
 browser-helpers for each axis More...
 
Double_tfIntegral
 
enum THnBase:: { ... }  fIntegralStatus
 array with bin weight sums More...
 
Int_t fNdimensions
 
Double_t fTsumw
 
Double_t fTsumw2
 
TArrayD fTsumwx
 
TArrayD fTsumwx2
 
- Protected Attributes inherited from TNamed
TString fName
 
TString fTitle
 

Private Member Functions

 THn (const THn &)
 
THnoperator= (const THn &)
 

Additional Inherited Members

- 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)
}
 
- Protected Types inherited from THnBase
enum  { kNoInt, kValidInt, kInvalidInt }
 array with bin weight sums More...
 
- Static Protected Member Functions inherited from THnBase
static THnBaseCreateHnAny (const char *name, const char *title, const TH1 *h1, Bool_t sparse, Int_t chunkSize=1024 *16)
 Create a THn / THnSparse object from a histogram deriving from TH1. More...
 
static THnBaseCreateHnAny (const char *name, const char *title, const THnBase *hn, Bool_t sparse, Int_t chunkSize=1024 *16)
 Create a THnSparse (if "sparse") or THn from "hn", possibly converting THn <-> THnSparse. More...
 

#include <THn.h>

Inheritance diagram for THn:
[legend]

Constructor & Destructor Documentation

◆ THn() [1/3]

THn::THn ( const THn )
private

◆ THn() [2/3]

THn::THn ( )
inlineprotected

Definition at line 45 of file THn.h.

◆ THn() [3/3]

THn::THn ( const char *  name,
const char *  title,
Int_t  dim,
const Int_t nbins,
const Double_t xmin,
const Double_t xmax 
)
protected

Construct a THn.

Definition at line 184 of file THn.cxx.

◆ ~THn()

THn::~THn ( )
virtual

Destruct a THn.

Definition at line 195 of file THn.cxx.

Member Function Documentation

◆ AddBinContent() [1/2]

void THn::AddBinContent ( const Int_t idx,
Double_t  v = 1. 
)
inline

Definition at line 112 of file THn.h.

◆ AddBinContent() [2/2]

void THn::AddBinContent ( Long64_t  bin,
Double_t  v = 1. 
)
inlinevirtual

Implements THnBase.

Definition at line 117 of file THn.h.

◆ AddBinError2()

void THn::AddBinError2 ( Long64_t  bin,
Double_t  e2 
)
inlinevirtual

Implements THnBase.

Definition at line 120 of file THn.h.

◆ AllocCoordBuf()

void THn::AllocCoordBuf ( ) const
protected

Create the coordinate buffer.

Outlined to hide allocation from inlined functions.

Definition at line 229 of file THn.cxx.

◆ CreateHn() [1/2]

static THn* THn::CreateHn ( const char *  name,
const char *  title,
const TH1 h1 
)
inlinestatic

Definition at line 52 of file THn.h.

◆ CreateHn() [2/2]

static THn* THn::CreateHn ( const char *  name,
const char *  title,
const THnBase hn 
)
inlinestatic

Definition at line 55 of file THn.h.

◆ CreateIter()

ROOT::Internal::THnBaseBinIter * THn::CreateIter ( Bool_t  respectAxisRange) const
virtual

Create an iterator over all bins. Public interface is THnIter.

Implements THnBase.

Definition at line 204 of file THn.cxx.

◆ FillBin()

void THn::FillBin ( Long64_t  bin,
Double_t  w 
)
inlinevirtual

Implements THnBase.

Definition at line 90 of file THn.h.

◆ GetArray() [1/2]

virtual const TNDArray& THn::GetArray ( ) const
pure virtual

Implemented in THnT< T >.

◆ GetArray() [2/2]

virtual TNDArray& THn::GetArray ( )
pure virtual

Implemented in THnT< T >.

◆ GetBin() [1/6]

Long64_t THn::GetBin ( const Int_t idx) const
inlinevirtual

Implements THnBase.

Definition at line 62 of file THn.h.

◆ GetBin() [2/6]

Long64_t THn::GetBin ( const Double_t x) const
inlinevirtual

Implements THnBase.

Definition at line 65 of file THn.h.

◆ GetBin() [3/6]

Long64_t THn::GetBin ( const char *  name[]) const
inlinevirtual

Implements THnBase.

Definition at line 72 of file THn.h.

◆ GetBin() [4/6]

Long64_t THn::GetBin ( const Int_t idx,
Bool_t  = kTRUE 
)
inlinevirtual

Implements THnBase.

Definition at line 80 of file THn.h.

◆ GetBin() [5/6]

Long64_t THn::GetBin ( const Double_t x,
Bool_t  = kTRUE 
)
inlinevirtual

Implements THnBase.

Definition at line 83 of file THn.h.

◆ GetBin() [6/6]

Long64_t THn::GetBin ( const char *  name[],
Bool_t  = kTRUE 
)
inlinevirtual

Implements THnBase.

Definition at line 86 of file THn.h.

◆ GetBinContent() [1/2]

Double_t THn::GetBinContent ( const Int_t idx) const
inline

Definition at line 123 of file THn.h.

◆ GetBinContent() [2/2]

Double_t THn::GetBinContent ( Long64_t  bin,
Int_t idx = 0 
) const
inlinevirtual

Implements THnBase.

Definition at line 128 of file THn.h.

◆ GetBinError2()

Double_t THn::GetBinError2 ( Long64_t  linidx) const
inlinevirtual

Implements THnBase.

Definition at line 141 of file THn.h.

◆ GetNbins()

Long64_t THn::GetNbins ( ) const
inlinevirtual

Implements THnBase.

Definition at line 60 of file THn.h.

◆ InitStorage()

void THn::InitStorage ( Int_t nbins,
Int_t  chunkSize 
)
protectedvirtual

Initialize the storage of a histogram created via Init()

Implements THnBase.

Definition at line 237 of file THn.cxx.

◆ operator=()

THn& THn::operator= ( const THn )
private

◆ Projection() [1/4]

TH1D* THn::Projection ( Int_t  xDim,
Option_t option = "" 
) const
inline

Definition at line 150 of file THn.h.

◆ Projection() [2/4]

TH2D* THn::Projection ( Int_t  yDim,
Int_t  xDim,
Option_t option = "" 
) const
inline

Definition at line 157 of file THn.h.

◆ Projection() [3/4]

TH3D* THn::Projection ( Int_t  xDim,
Int_t  yDim,
Int_t  zDim,
Option_t option = "" 
) const
inline

Definition at line 165 of file THn.h.

◆ Projection() [4/4]

THn* THn::Projection ( Int_t  ndim,
const Int_t dim,
Option_t option = "" 
) const
inline

Definition at line 173 of file THn.h.

◆ Rebin() [1/2]

THn* THn::Rebin ( Int_t  group) const
inline

Definition at line 178 of file THn.h.

◆ Rebin() [2/2]

THn* THn::Rebin ( const Int_t group) const
inline

Definition at line 181 of file THn.h.

◆ Reset()

void THn::Reset ( Option_t option = "")
virtual

Reset the contents of a THn.

Implements THnBase.

Definition at line 247 of file THn.cxx.

◆ SetBinContent() [1/2]

void THn::SetBinContent ( const Int_t idx,
Double_t  v 
)
inline

Definition at line 100 of file THn.h.

◆ SetBinContent() [2/2]

void THn::SetBinContent ( Long64_t  bin,
Double_t  v 
)
inlinevirtual

Implements THnBase.

Definition at line 105 of file THn.h.

◆ SetBinError2()

void THn::SetBinError2 ( Long64_t  bin,
Double_t  e2 
)
inlinevirtual

Implements THnBase.

Definition at line 108 of file THn.h.

◆ Sumw2()

void THn::Sumw2 ( )
virtual

Enable calculation of errors.

Implements THnBase.

Definition at line 213 of file THn.cxx.

Member Data Documentation

◆ fCoordBuf

Int_t* THn::fCoordBuf
mutableprotected

Definition at line 189 of file THn.h.

◆ fSumw2

TNDArrayT<Double_t> THn::fSumw2
protected

Definition at line 188 of file THn.h.

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