TVectorD
class description - source file - inheritance tree
protected:
void Allocate(Int_t nrows, Int_t row_lwb = 0)
void Invalidate()
public:
TVectorD TVectorD()
TVectorD TVectorD(Int_t n)
TVectorD TVectorD(Int_t lwb, Int_t upb)
TVectorD TVectorD(Int_t n, const Double_t* elements)
TVectorD TVectorD(Int_t lwb, Int_t upb, const Double_t* elements)
TVectorD TVectorD(const TVectorD& another)
TVectorD TVectorD(const TMatrixDRow& mr)
TVectorD TVectorD(const TMatrixDColumn& mc)
TVectorD TVectorD(const TMatrixDDiag& md)
virtual void ~TVectorD()
TVectorD& Abs()
TVectorD& Apply(const TElementActionD& action)
TVectorD& Apply(const TElementPosActionD& action)
static TClass* Class()
virtual void Draw(Option_t* option)
Double_t* GetElements()
const Double_t* GetElements() const
Int_t GetLwb() const
Int_t GetNoElements() const
Int_t GetNrows() const
Int_t GetUpb() const
virtual TClass* IsA() const
Bool_t IsValid() const
Double_t Norm1() const
Double_t Norm2Sqr() const
Double_t NormInf() const
Bool_t operator!=(Double_t val) const
const Double_t& operator()(Int_t index) const
Double_t& operator()(Int_t index)
TVectorD& operator*=(Double_t val)
TVectorD& operator*=(const TMatrixD& a)
TVectorD& operator+=(Double_t val)
TVectorD& operator-=(Double_t val)
Bool_t operator<(Double_t val) const
Bool_t operator<=(Double_t val) const
TVectorD& operator=(const TVectorD& source)
TVectorD& operator=(Double_t val)
TVectorD& operator=(const TMatrixDRow& mr)
TVectorD& operator=(const TMatrixDColumn& mc)
TVectorD& operator=(const TMatrixDDiag& md)
Bool_t operator==(Double_t val) const
Bool_t operator>(Double_t val) const
Bool_t operator>=(Double_t val) const
const Double_t& operator[](Int_t index) const
Double_t& operator[](Int_t index)
virtual void Print(Option_t* option) const
void ResizeTo(Int_t n)
void ResizeTo(Int_t lwb, Int_t upb)
void ResizeTo(const TVectorD& v)
void SetElements(const Double_t* elements)
virtual void ShowMembers(TMemberInspector& insp, char* parent)
TVectorD& Sqr()
TVectorD& Sqrt()
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
TVectorD& Zero()
protected:
Int_t fNmem ! number of rows in allocated memory (>=fNrows)
Int_t fNrows number of rows
Int_t fRowLwb lower bound of the row index
Double_t* fElements [fNrows] elements themselves
Linear Algebra Package
The present package implements all the basic algorithms dealing
with vectors, matrices, matrix columns, rows, diagonals, etc.
Matrix elements are arranged in memory in a COLUMN-wise
fashion (in FORTRAN's spirit). In fact, it makes it very easy to
feed the matrices to FORTRAN procedures, which implement more
elaborate algorithms.
Unless otherwise specified, matrix and vector indices always start
with 0, spanning up to the specified limit-1.
The present package provides all facilities to completely AVOID
returning matrices. Use "TMatrixD A(TMatrixD::kTransposed,B);" and
other fancy constructors as much as possible. If one really needs
to return a matrix, return a TLazyMatrixD object instead. The
conversion is completely transparent to the end user, e.g.
"TMatrixD m = THaarMatrixD(5);" and _is_ efficient.
For usage examples see $ROOTSYS/test/vmatrix.cxx and vvector.cxx
and also:
http://root.cern.ch/root/html/TMatrixD.html#TMatrixD:description
The implementation is based on original code by
Oleg E. Kiselyov (oleg@pobox.com).
void Allocate(Int_t nrows, Int_t row_lwb)
Allocate new vector. Arguments are number of rows and row
lowerbound (0 default).
TVectorD(Int_t lwb, Int_t upb, Double_t va_(iv1), ...)
Make a vector and assign initial values. Argument list should contain
Double_t values to assign to vector elements. The list must be
terminated by the string "END". Example:
TVectorD foo(1,3,0.0,1.0,1.5,"END");
TVectorD(const TMatrixDRow &mr) : TObject(mr)
TVectorD(const TMatrixDColumn &mc) : TObject(mc)
TVectorD(const TMatrixDDiag &md) : TObject(md)
~TVectorD()
TVectorD destructor.
void Draw(Option_t *option)
Draw this vector using an intermediate histogram
The histogram is named "TVectorD" by default and no title
void ResizeTo(Int_t lwb, Int_t upb)
Resize the vector for a specified number of elements, trying to keep
intact as many elements of the old vector as possible. If the vector is
expanded, the new elements will be zeroes.
Double_t Norm1() const
Compute the 1-norm of the vector SUM{ |v[i]| }.
Double_t Norm2Sqr() const
Compute the square of the 2-norm SUM{ v[i]^2 }.
Double_t NormInf() const
Compute the infinity-norm of the vector MAX{ |v[i]| }.
TVectorD Abs()
Take an absolute value of a vector, i.e. apply Abs() to each element.
TVectorD Sqr()
Square each element of the vector.
TVectorD Sqrt()
Take square root of all elements.
TVectorD Apply(const TElementActionD &action)
Apply action to each element of the vector.
TVectorD Apply(const TElementPosActionD &action)
Apply action to each element of the vector. In action the location
of the current element is known.
void Print(Option_t *) const
Print the vector as a list of elements.
void Streamer(TBuffer &R__b)
Stream an object of class TVectorD.
Inline Functions
void Invalidate()
TVectorD TVectorD(Int_t lwb, Int_t upb, const Double_t* elements)
TVectorD TVectorD(const TVectorD& another)
TVectorD TVectorD(const TMatrixDRow& mr)
TVectorD TVectorD(const TMatrixDColumn& mc)
TVectorD TVectorD(const TMatrixDDiag& md)
void ResizeTo(Int_t lwb, Int_t upb)
void ResizeTo(const TVectorD& v)
Bool_t IsValid() const
const Double_t& operator()(Int_t index) const
Double_t& operator()(Int_t index)
const Double_t& operator[](Int_t index) const
Double_t& operator[](Int_t index)
Int_t GetLwb() const
Int_t GetUpb() const
Int_t GetNrows() const
Int_t GetNoElements() const
Double_t* GetElements()
const Double_t* GetElements() const
void SetElements(const Double_t* elements)
TVectorD& operator=(const TVectorD& source)
TVectorD& operator=(Double_t val)
TVectorD& operator=(const TMatrixDRow& mr)
TVectorD& operator=(const TMatrixDColumn& mc)
TVectorD& operator=(const TMatrixDDiag& md)
TVectorD& operator-=(Double_t val)
TVectorD& operator+=(Double_t val)
TVectorD& operator*=(Double_t val)
TVectorD& operator*=(const TMatrixD& a)
Bool_t operator==(Double_t val) const
Bool_t operator!=(Double_t val) const
Bool_t operator<(Double_t val) const
Bool_t operator<=(Double_t val) const
Bool_t operator>(Double_t val) const
Bool_t operator>=(Double_t val) const
TVectorD& Zero()
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void StreamerNVirtual(TBuffer& b)
Author: Fons Rademakers 03/11/97
Last update: root/matrix:$Name: $:$Id: TVectorD.cxx,v 1.25 2003/02/05 23:36:59 rdm Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
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