class THLimitsFinder: public TObject


THLimitsFinder

 Class to compute nice axis limits.

 This class is called by default by the histograming system
 and also by TTree::Draw, TTreePlayer::DrawSelect.

 A different finder may be specified via THLimitsFinder::SetFinder.

Function Members (Methods)

public:
THLimitsFinder()
THLimitsFinder(const THLimitsFinder&)
virtual~THLimitsFinder()
voidTObject::AbstractMethod(const char* method) const
virtual voidTObject::AppendPad(Option_t* option = "")
virtual voidTObject::Browse(TBrowser* b)
static TClass*Class()
virtual const char*TObject::ClassName() const
virtual voidTObject::Clear(Option_t* = "")
virtual TObject*TObject::Clone(const char* newname = "") const
virtual Int_tTObject::Compare(const TObject* obj) const
virtual voidTObject::Copy(TObject& object) const
virtual voidTObject::Delete(Option_t* option = "")
virtual Int_tTObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual voidTObject::Draw(Option_t* option = "")
virtual voidTObject::DrawClass() const
virtual TObject*TObject::DrawClone(Option_t* option = "") const
virtual voidTObject::Dump() const
virtual voidTObject::Error(const char* method, const char* msgfmt) const
virtual voidTObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual voidTObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual voidTObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual voidTObject::Fatal(const char* method, const char* msgfmt) const
virtual Int_tFindGoodLimits(TH1* h, Double_t xmin, Double_t xmax)
virtual Int_tFindGoodLimits(TH1* h, Double_t xmin, Double_t xmax, Double_t ymin, Double_t ymax)
virtual Int_tFindGoodLimits(TH1* h, Double_t xmin, Double_t xmax, Double_t ymin, Double_t ymax, Double_t zmin, Double_t zmax)
virtual TObject*TObject::FindObject(const char* name) const
virtual TObject*TObject::FindObject(const TObject* obj) const
virtual Option_t*TObject::GetDrawOption() const
static Long_tTObject::GetDtorOnly()
virtual const char*TObject::GetIconName() const
static THLimitsFinder*GetLimitsFinder()
virtual const char*TObject::GetName() const
virtual char*TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_tTObject::GetObjectStat()
virtual Option_t*TObject::GetOption() const
virtual const char*TObject::GetTitle() const
virtual UInt_tTObject::GetUniqueID() const
virtual Bool_tTObject::HandleTimer(TTimer* timer)
virtual ULong_tTObject::Hash() const
virtual voidTObject::Info(const char* method, const char* msgfmt) const
virtual Bool_tTObject::InheritsFrom(const char* classname) const
virtual Bool_tTObject::InheritsFrom(const TClass* cl) const
virtual voidTObject::Inspect() const
voidTObject::InvertBit(UInt_t f)
virtual TClass*IsA() const
virtual Bool_tTObject::IsEqual(const TObject* obj) const
virtual Bool_tTObject::IsFolder() const
Bool_tTObject::IsOnHeap() const
virtual Bool_tTObject::IsSortable() const
Bool_tTObject::IsZombie() const
virtual voidTObject::ls(Option_t* option = "") const
voidTObject::MayNotUse(const char* method) const
virtual Bool_tTObject::Notify()
static voidTObject::operator delete(void* ptr)
static voidTObject::operator delete(void* ptr, void* vp)
static voidTObject::operator delete[](void* ptr)
static voidTObject::operator delete[](void* ptr, void* vp)
void*TObject::operator new(size_t sz)
void*TObject::operator new(size_t sz, void* vp)
void*TObject::operator new[](size_t sz)
void*TObject::operator new[](size_t sz, void* vp)
THLimitsFinder&operator=(const THLimitsFinder&)
static voidOptimize(Double_t A1, Double_t A2, Int_t nold, Double_t& BinLow, Double_t& BinHigh, Int_t& nbins, Double_t& BWID, Option_t* option = "")
static voidOptimizeLimits(Int_t nbins, Int_t& newbins, Double_t& xmin, Double_t& xmax, Bool_t isInteger)
virtual voidTObject::Paint(Option_t* option = "")
virtual voidTObject::Pop()
virtual voidTObject::Print(Option_t* option = "") const
virtual Int_tTObject::Read(const char* name)
virtual voidTObject::RecursiveRemove(TObject* obj)
voidTObject::ResetBit(UInt_t f)
virtual voidTObject::SaveAs(const char* filename = "", Option_t* option = "") const
virtual voidTObject::SavePrimitive(basic_ostream<char,char_traits<char> >& out, Option_t* option = "")
voidTObject::SetBit(UInt_t f)
voidTObject::SetBit(UInt_t f, Bool_t set)
virtual voidTObject::SetDrawOption(Option_t* option = "")
static voidTObject::SetDtorOnly(void* obj)
static voidSetLimitsFinder(THLimitsFinder* finder)
static voidTObject::SetObjectStat(Bool_t stat)
virtual voidTObject::SetUniqueID(UInt_t uid)
virtual voidShowMembers(TMemberInspector& insp, char* parent)
virtual voidStreamer(TBuffer& b)
voidStreamerNVirtual(TBuffer& b)
virtual voidTObject::SysError(const char* method, const char* msgfmt) const
Bool_tTObject::TestBit(UInt_t f) const
Int_tTObject::TestBits(UInt_t f) const
virtual voidTObject::UseCurrentStyle()
virtual voidTObject::Warning(const char* method, const char* msgfmt) const
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const
protected:
virtual voidTObject::DoError(int level, const char* location, const char* fmt, va_list va) const
voidTObject::MakeZombie()

Data Members

public:
enum TObject::EStatusBits { kCanDelete
kMustCleanup
kObjInCanvas
kIsReferenced
kHasUUID
kCannotPick
kNoContextMenu
kInvalidObject
};
enum TObject::[unnamed] { kIsOnHeap
kNotDeleted
kZombie
kBitMask
kSingleKey
kOverwrite
kWriteDelete
};
protected:
static THLimitsFinder*fgLimitsFinder!Pointer to hist limits finder

Class Charts

Inheritance Inherited Members Includes Libraries
Class Charts

Function documentation

THLimitsFinder(const THLimitsFinder& )
~THLimitsFinder()
Int_t FindGoodLimits(TH1* h, Double_t xmin, Double_t xmax)
 compute the best axis limits for the X axis.
 If the bit kIsInteger is set, the number of channels is also recomputed.
 The axis parameters are replaced by the optimized parameters
 example:
  With the input parameters xmin=-1.467 and xmax=2.344, the function
  will compute better limits -1.8 and 2.7 and store them in the axis.
Int_t FindGoodLimits(TH1* h, Double_t xmin, Double_t xmax, Double_t ymin, Double_t ymax)
 compute the best axis limits for the X and Y axis.
 If the bit kIsInteger is set, the number of channels is also recomputed.
 The axis parameters are replaced by the optimized parameters
Int_t FindGoodLimits(TH1* h, Double_t xmin, Double_t xmax, Double_t ymin, Double_t ymax, Double_t zmin, Double_t zmax)
 compute the best axis limits for the X, Y and Z axis.
 If the bit kIsInteger is set, the number of channels is also recomputed.
 The axis parameters are replaced by the optimized parameters
THLimitsFinder * GetLimitsFinder()
 Return pointer to the current finder.
 Create one if none exists
 Use SetLimitsFinder to set a user defined finder.
void SetLimitsFinder(THLimitsFinder* finder)
 This static function can be used to specify a finder derived from THLimitsFinder.
 The finder may redefine the functions FindGoodLimits.
 Note that the redefined functions may call THLimitsFinder::FindGoodLimits.
void Optimize(Double_t A1, Double_t A2, Int_t nold, Double_t& BinLow, Double_t& BinHigh, Int_t& nbins, Double_t& BWID, Option_t* option = "")
 static function to compute reasonable axis limits

 Input parameters:

  A1,A2 : Old WMIN,WMAX .
  BinLow,BinHigh : New WMIN,WMAX .
  nold   : Old NDIV .
  nbins    : New NDIV .
void OptimizeLimits(Int_t nbins, Int_t& newbins, Double_t& xmin, Double_t& xmax, Bool_t isInteger)
 Optimize axis limits.
 When isInter=kTRUE, the function makes an integer binwidth
 and recompute the number of bins accordingly.
THLimitsFinder(const THLimitsFinder& )

Author: Rene Brun 30/08/99
Last update: root/hist:$Id: THLimitsFinder.h 20882 2007-11-19 11:31:26Z rdm $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
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