TSparseRowMatrix Class Reference

#include <linalg.h>

Inherits TMatrix.

List of all members.

Public Member Functions
	TSparseRowMatrix ()
	TSparseRowMatrix (TVec< TIntFltKdV > _RowSpVV)
	TSparseRowMatrix (TVec< TIntFltKdV > _RowSpVV, const int &_RowN, const int &_ColN)
	TSparseRowMatrix (const TStr &MatlabMatrixFNm)
void	Save (TSOut &SOut)
void	Load (TSIn &SIn)
Public Attributes
int	RowN
int	ColN
TVec< TIntFltKdV >	RowSpVV
Protected Member Functions
virtual void	PMultiply (const TFltVV &B, int ColId, TFltV &Result) const
virtual void	PMultiply (const TFltV &Vec, TFltV &Result) const
virtual void	PMultiplyT (const TFltVV &B, int ColId, TFltV &Result) const
virtual void	PMultiplyT (const TFltV &Vec, TFltV &Result) const
int	PGetRows () const
int	PGetCols () const

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Detailed Description

Definition at line 90 of file linalg.h.

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Constructor & Destructor Documentation

TSparseRowMatrix::TSparseRowMatrix

(

)

[inline]

Definition at line 110 of file linalg.h.

: TMatrix() {}

TSparseRowMatrix::TSparseRowMatrix

(

TVec< TIntFltKdV >

_RowSpVV

)

[inline]

Definition at line 111 of file linalg.h.

: TMatrix(), RowSpVV(_RowSpVV) {}

TSparseRowMatrix::TSparseRowMatrix	(	TVec< TIntFltKdV >	_RowSpVV,
		const int &	_RowN,
		const int &	_ColN
	)		[inline]

Definition at line 112 of file linalg.h.

                                                                                   : 
                TMatrix(), RowN(_RowN), ColN(_ColN), RowSpVV(_RowSpVV) {}

TSparseRowMatrix::TSparseRowMatrix

(

const TStr &

MatlabMatrixFNm

)

Definition at line 53 of file linalg.cpp.

                                                              {
   FILE *F = fopen(MatlabMatrixFNm.CStr(), "rt");  IAssert(F != NULL);
   TVec<TTriple<TInt, TInt, TSFlt> > MtxV;
   RowN = 0;  ColN = 0;
   while (! feof(F)) {
     int row=-1, col=-1; float val;
     if (fscanf(F, "%d %d %f\n", &row, &col, &val) == 3) {
       IAssert(row > 0 && col > 0);
       MtxV.Add(TTriple<TInt, TInt, TSFlt>(row, col, val));
       RowN = TMath::Mx(RowN, row);
       ColN = TMath::Mx(ColN, col);
     }
   }
   fclose(F);
   // create matrix
   MtxV.Sort();
   RowSpVV.Gen(RowN);
   int cnt = 0;
   for (int row = 1; row <= RowN; row++) {
     while (cnt < MtxV.Len() && MtxV[cnt].Val1 == row) {
       RowSpVV[row-1].Add(TIntFltKd(MtxV[cnt].Val2-1, MtxV[cnt].Val3()));
       cnt++;
     }
   }
}

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Member Function Documentation

void TSparseRowMatrix::Load

(

TSIn &

SIn

)

[inline]

Definition at line 119 of file linalg.h.

                         {
        SIn.Load(RowN); SIn.Load(ColN); RowSpVV = TVec<TIntFltKdV>(SIn); }

int TSparseRowMatrix::PGetCols

(

)

const [inline, protected, virtual]

Implements TMatrix.

Definition at line 107 of file linalg.h.

{ return ColN; }

int TSparseRowMatrix::PGetRows

(

)

const [inline, protected, virtual]

Implements TMatrix.

Definition at line 106 of file linalg.h.

{ return RowN; }

void TSparseRowMatrix::PMultiply	(	const TFltVV &	B,
		int	ColId,
		TFltV &	Result
	)		const [protected, virtual]

Implements TMatrix.

Definition at line 101 of file linalg.cpp.

                                                                                {
    Assert(B.GetRows() >= ColN && Result.Len() >= RowN);
    for (int j = 0; j < RowN; j++) {
        const TIntFltKdV& RowV = RowSpVV[j];
        int len = RowV.Len(); Result[j] = 0.0;
        for (int i = 0; i < len; i++) {
            Result[j] += RowV[i].Dat * B(RowV[i].Key, ColId);
        }
    }
}

void TSparseRowMatrix::PMultiply	(	const TFltV &	Vec,
		TFltV &	Result
	)		const [protected, virtual]

Implements TMatrix.

Definition at line 112 of file linalg.cpp.

                                                                      {
    Assert(Vec.Len() >= ColN && Result.Len() >= RowN);
    for (int j = 0; j < RowN; j++) {
        const TIntFltKdV& RowV = RowSpVV[j];
        int len = RowV.Len(); Result[j] = 0.0;
        for (int i = 0; i < len; i++) {
            Result[j] += RowV[i].Dat * Vec[RowV[i].Key];
        }
    }
}

void TSparseRowMatrix::PMultiplyT	(	const TFltVV &	B,
		int	ColId,
		TFltV &	Result
	)		const [protected, virtual]

Implements TMatrix.

Definition at line 79 of file linalg.cpp.

                                                                                 {
    Assert(B.GetRows() >= RowN && Result.Len() >= ColN);
    for (int i = 0; i < ColN; i++) Result[i] = 0.0;
    for (int j = 0; j < RowN; j++) {
        const TIntFltKdV& RowV = RowSpVV[j]; int len = RowV.Len();
        for (int i = 0; i < len; i++) {
            Result[RowV[i].Key] += RowV[i].Dat * B(j,ColId);
        }
    }
}

void TSparseRowMatrix::PMultiplyT	(	const TFltV &	Vec,
		TFltV &	Result
	)		const [protected, virtual]

Implements TMatrix.

Definition at line 90 of file linalg.cpp.

                                                                       {
    Assert(Vec.Len() >= RowN && Result.Len() >= ColN);
    for (int i = 0; i < ColN; i++) Result[i] = 0.0;
    for (int j = 0; j < RowN; j++) {
        const TIntFltKdV& RowV = RowSpVV[j]; int len = RowV.Len();
        for (int i = 0; i < len; i++) {
            Result[RowV[i].Key] += RowV[i].Dat * Vec[j];
        }
    }
}

void TSparseRowMatrix::Save

(

TSOut &

SOut

)

[inline]

Definition at line 117 of file linalg.h.

                           {
        SOut.Save(RowN); SOut.Save(ColN); RowSpVV.Save(SOut); }

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Member Data Documentation

int TSparseRowMatrix::ColN

Definition at line 93 of file linalg.h.

int TSparseRowMatrix::RowN

Definition at line 93 of file linalg.h.

TVec<TIntFltKdV> TSparseRowMatrix::RowSpVV

Definition at line 95 of file linalg.h.

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

• glib-core/linalg.h
• glib-core/linalg.cpp