A CMatrix class for dynamic sized matrices

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Introduction

CMatrix is a class to manipulate a set of matrices with dynamic sizes. It can be used different matrices used for graphical display, solving equations, and for vector manipulations.

Here is the typedef:

typedef std::vector<double> MXCol;
typedef std::vector<double>::iterator MXColPos;
typedef std::vector<MXCol> MXRow;
typedef std::vector<MXCol>::iterator MXRowPos;
typedef enum {MX_EMPTY, MX_ROWEMPTY, MX_COLEMPTY, MX_UNITY, 
    MX_ROWVECTOR, MX_COLVECTOR, MX_SQUARE, MX_RECT} MXType;
typedef struct _MX_SIZESTRUCT
{
 int ms_row;
 int ms_col;
}MXSize;

It is clear that I have used a std::vector<> and is the reason why a dynamic size matrix was created.

The following are the functions and members:

//size functions
void mxSetSize(int row, int col);
void mxSetSize(MXSize& size);
MXSize mxGetSize();
MXType mxGetType();
//matrix operations
bool mxInsertRow(int nAfterRow, int nArraySize, const double *array);
bool mxInsertCol(int nAfterCol, int nArraySize, const double *array);
bool mxInsertRow(int nAfterRow, CMatrix& m);
bool mxInsertCol(int nAfterCol, CMatrix& m);
bool mxInsertMatrix(int nAfterRow, int nAfterCol, CMatrix& m);
bool mxEraseRow(int nRowCount);
bool mxEraseCol(int nColCount);
void mxFill(double value);
//testing
bool mxIsOK();
//retrieve matrix
CMatrix mxGetSubMatrix(int nRowCount, int nColCount, MXSize& size);
//calculation
double mxDet();
CMatrix mxInverse();
//operator functions
CMatrix& operator=(CMatrix& m);
CMatrix& operator=(double a);
MXCol& operator[](int n);

//protected functions
void mxSetType();
void mxZeroCol(MXCol& col);
void mxExtendRowZero(int pRowPos, int Num);
void mxExtendColZero(int pColPos, int Num);
void mxRefreshSize();

//friend functions
friend ostream& operator<<(ostream& out, CMatrix& m);
friend CMatrix operator +(CMatrix& m1, CMatrix& m2);
friend CMatrix operator -(CMatrix& m1, CMatrix& m2);
friend CMatrix operator *(CMatrix& m1, CMatrix& m2);
friend CMatrix operator *(CMatrix& m, double f);
friend CMatrix operator /(CMatrix& m, double f);
friend bool operator ==(CMatrix& m1, CMatrix& m2);
friend bool operator !=(CMatrix& m1, CMatrix& m2);
friend bool mxIsSameSize(CMatrix& m1, CMatrix& m2);
friend bool mxIsProducable(CMatrix& m1, CMatrix& m2);
friend void swap(CMatrix& m1, CMatrix& m2);
friend CMatrix mxTrans(CMatrix& m);

//member
MXSize mx_size;
MXType mx_type;
MXRow mx_row;

To declare the matrix class:

MATRIX m(2,3);

which means a 2x3 matrix:

[][][]
[][][]

is created.

Note that if the matrix is not given a size initially, we do:

MATRIX m;
MATRIX m(2,0)
MATRIX m(0,2)

Feel free to use the code.