TTreeFormula

class TTreeFormula : public TFormula

    public:

          TTreeFormula TTreeFormula()
          TTreeFormula TTreeFormula(char* name, char* formula, TTree* tree)
          TTreeFormula TTreeFormula(TTreeFormula&)
          virtual void ~TTreeFormula()
               TClass* Class()
         virtual Int_t DefinedVariable(TString& variable)
      virtual Double_t EvalInstance(Int_t i = 0)
        virtual TLeaf* GetLeaf(Int_t n)
          TMethodCall* GetMethodCall(Int_t code)
         virtual Int_t GetMultiplicity()
         virtual Int_t GetNcodes()
         virtual Int_t GetNdata()
       virtual TClass* IsA()
         virtual char* PrintValue(Int_t mode = 0)
          virtual void SetTree(TTree* tree)
          virtual void ShowMembers(TMemberInspector& insp, char* parent)
          virtual void Streamer(TBuffer& b)

  Data Members

    protected:

         TTree* fTree          pointer to Tree
        Short_t fCodes[100]    List of leaf numbers referenced in formula
          Int_t fNcodes        Number of leaves referenced in formula
          Int_t fMultiplicity  Number of array elements in leaves in case of a TClonesArray
          Int_t fInstance      Instance number for GetValue
          Int_t fNindex        Size of fIndex
         Int_t* fIndex         array of instances numbers
      TObjArray fMethods       List of leaf method calls

Class Description

     A TreeFormula is used to pass a selection expression
     to the Tree drawing routine. See TTree::Draw

  A TreeFormula can contain any arithmetic expression including
  standard operators and mathematical functions separated by operators.
  Examples of valid expression:
          "x<y && sqrt(z)>3.2"

*-*-*-*-*-*-*-*-*-*-*Tree Formula default constructor*-*-*-*-*-*-*-*-*-*
*-*                  ================================

*-*-*-*-*-*-*-*-*-*-*Normal Tree Formula constructor*-*-*-*-*-*-*-*-*-*-*
*-*                  ===============================

*-*-*-*-*-*-*-*-*-*-*Tree Formula default destructor*-*-*-*-*-*-*-*-*-*-*
*-*                  =================================

*-*-*-*-*-*Check if name is in the list of Tree/Branch leaves*-*-*-*-*
*-*        ==================================================

   This member function redefines the function in TFormula
   If a leaf has a name corresponding to the argument name, then
   returns a new code.
   A TTreeFormula may contain more than one variable.
   For each variable referenced, the pointers to the corresponding
   branch and leaf is stored in the object arrays fBranches and fLeaves.

   name can be :
      - Leaf_Name (simple variable or data member of a ClonesArray)
      - Branch_Name.Leaf_Name
      - Branch_Name.Method_Name

*-*-*-*-*-*-*-*-*-*-*Evaluate this treeformula*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                  =========================

*-*-*-*-*-*-*-*Return leaf corresponding to serial number n*-*-*-*-*-*
*-*            ============================================

*-*-*-*-*-*-*-*Return methodcall corresponding to code*-*-*-*-*-*
*-*            =======================================

  function called by TLeafObject::GetValue
  with the value of fIndex computed in TTreeFormula::Definedvariable

*-*-*-*-*-*-*-*Return number of data words in the leaf*-*-*-*-*-*-*-*
*-*            =======================================

*-*-*-*-*-*-*-*Return value of variable as a string*-*-*-*-*-*-*-*
*-*            ====================================

      mode = -2 : Print line with ***
      mode = -1 : Print column names
      mode = 0  : Print column values

 Stream an object of class TTreeFormula.

Inline Functions

               Int_t GetMultiplicity()
               Int_t GetNcodes()
                void SetTree(TTree* tree)
             TClass* Class()
             TClass* IsA()
                void ShowMembers(TMemberInspector& insp, char* parent)
        TTreeFormula TTreeFormula(TTreeFormula&)