TMatrix

class TMatrix : public TObject

    protected:

              void Allocate(Int_t nrows, Int_t ncols, Int_t row_lwb = 0, Int_t col_lwb = 0)
              void AMultB(const TMatrix& a, const TMatrix& b)
              void AtMultB(const TMatrix& a, const TMatrix& b)
       static void EigenSort(TMatrix& eigenVectors, TVector& eigenValues)
              void Invalidate()
              void Invert(const TMatrix& m)
              void InvertPosDef(const TMatrix& m)
       static void MakeEigenVectors(TVector& d, TVector& e, TMatrix& z)
       static void MakeTridiagonal(TMatrix& a, TVector& d, TVector& e)
      static Int_t Pdcholesky(const Real_t* a, Real_t* u, const Int_t n)
              void Transpose(const TMatrix& m)

    public:

                       TMatrix()
                       TMatrix(Int_t nrows, Int_t ncols)
                       TMatrix(Int_t row_lwb, Int_t row_upb, Int_t col_lwb, Int_t col_upb)
                       TMatrix(Int_t nrows, Int_t ncols, const Real_t* elements, Option_t* option)
                       TMatrix(Int_t row_lwb, Int_t row_upb, Int_t col_lwb, Int_t col_upb, const Real_t* elements, Option_t* option)
                       TMatrix(const TMatrix& another)
                       TMatrix(TMatrix::EMatrixCreatorsOp1 op, const TMatrix& prototype)
                       TMatrix(const TMatrix& a, TMatrix::EMatrixCreatorsOp2 op, const TMatrix& b)
                       TMatrix(const TLazyMatrix& lazy_constructor)
         const TMatrix EigenVectors(TVector& eigenValues) const
               virtual ~TMatrix()
              TMatrix& Abs()
              TMatrix& Apply(const TElementPosAction& action)
              TMatrix& Apply(const TElementAction& action)
        static TClass* Class()
          virtual void Clear(Option_t* option)
              Double_t ColNorm() const
              Double_t Determinant() const
          virtual void Draw(Option_t* option)
              Double_t E2Norm() const
                 Int_t GetColLwb() const
                 Int_t GetColUpb() const
                  void GetElements(Real_t* elements, Option_t* option) const
         const Real_t* GetElements() const
               Real_t* GetElements()
                 Int_t GetNcols() const
                 Int_t GetNoElements() const
                 Int_t GetNrows() const
                 Int_t GetRowLwb() const
                 Int_t GetRowUpb() const
              TMatrix& Invert(Double_t* determ_ptr = 0)
              TMatrix& InvertPosDef()
       virtual TClass* IsA() const
                Bool_t IsSymmetric() const
                Bool_t IsValid() const
              TMatrix& MakeSymmetric()
                  void Mult(const TMatrix& a, const TMatrix& b)
              Double_t Norm1() const
              TMatrix& NormByColumn(const TVector& v, Option_t* option = "D")
              TMatrix& NormByDiag(const TVector& v, Option_t* option = "D")
              TMatrix& NormByRow(const TVector& v, Option_t* option = "D")
              Double_t NormInf() const
                Bool_t operator!=(Real_t val) const
         const Real_t& operator()(Int_t rown, Int_t coln) const
               Real_t& operator()(Int_t rown, Int_t coln)
              TMatrix& operator*=(const TMatrixRow& row)
              TMatrix& operator*=(const TMatrixDiag& diag)
              TMatrix& operator*=(Double_t val)
              TMatrix& operator*=(const TMatrix& source)
              TMatrix& operator*=(const TMatrixColumn& col)
              TMatrix& operator+=(Double_t val)
              TMatrix& operator-=(Double_t val)
              TMatrix& operator/=(const TMatrixDiag& diag)
              TMatrix& operator/=(const TMatrixColumn& col)
              TMatrix& operator/=(const TMatrixRow& row)
                Bool_t operator<(Real_t val) const
                Bool_t operator<=(Real_t val) const
              TMatrix& operator=(Real_t val)
              TMatrix& operator=(const TLazyMatrix& source)
              TMatrix& operator=(const TMatrix& source)
                Bool_t operator==(Real_t val) const
                Bool_t operator>(Real_t val) const
                Bool_t operator>=(Real_t val) const
      const TMatrixRow operator[](Int_t rown) const
            TMatrixRow operator[](Int_t rown)
          virtual void Print(Option_t* option) const
                  void ResizeTo(Int_t nrows, Int_t ncols)
                  void ResizeTo(Int_t row_lwb, Int_t row_upb, Int_t col_lwb, Int_t col_upb)
                  void ResizeTo(const TMatrix& m)
              Double_t RowNorm() const
                  void SetElements(const Real_t* elements, Option_t* option)
          virtual void ShowMembers(TMemberInspector& insp, char* parent)
              TMatrix& Sqr()
              TMatrix& Sqrt()
          virtual void Streamer(TBuffer& b)
                  void StreamerNVirtual(TBuffer& b)
              TMatrix& UnitMatrix()
              TMatrix& Zero()

Data Members

    protected:

         Int_t fNrows     number of rows
         Int_t fNcols     number of columns
         Int_t fNelems    number of elements in matrix
         Int_t fRowLwb    lower bound of the row index
         Int_t fColLwb    lower bound of the col index
       Real_t* fElements  [fNelems] elements themselves
      Real_t** fIndex     ! index[i] = &matrix(0,i) (col index)

    public:

      static const TMatrix::EMatrixCreatorsOp1 kZero            
      static const TMatrix::EMatrixCreatorsOp1 kUnit            
      static const TMatrix::EMatrixCreatorsOp1 kTransposed      
      static const TMatrix::EMatrixCreatorsOp1 kInverted        
      static const TMatrix::EMatrixCreatorsOp1 kInvertedPosDef  
      static const TMatrix::EMatrixCreatorsOp2 kMult            
      static const TMatrix::EMatrixCreatorsOp2 kTransposeMult   
      static const TMatrix::EMatrixCreatorsOp2 kInvMult         
      static const TMatrix::EMatrixCreatorsOp2 kInvPosDefMult   
      static const TMatrix::EMatrixCreatorsOp2 kAtBA            

Class Description