The NMat Library

NMat is a ANSI C library that provides an API for matrix operations.

The current operations implemented by NMatlib are:

Operation	Description
Create	Creates a NMatrix object
Destroy	Destroys a NMatrix object
Clone	Creates a hard copy of an existent NMatrix object
Sum	Computes the sum of two matrices
Scalar Multiplication	Multiplies the matrix with a scalar
Product	Computes the product of two matrices
Secondary Diagonal	Returns the secondary diagonal of a matrix
Primary Diagonal	Returns the primary diagonal of a matrix
Minor	Returns the minor of a matrix
Determinant	Computes the determinant of a matrix
Transpose	Computes the transpose of a matrix
Adjugate	Computes the adjugate of a matrix
Inverse	Computes the inverse of a matrix
Minimum Element	Returns the smallest element of a matrix
Maximum Element	Returns the largest element of a matrix
Sum of all elements	Returns the sum of all elements
Product of all Elements	Returns the product of all elements
Number of Elements	Returns the total number of elements that exist in a matrix
Submatrix	Returns a submatrix specified by a start/end column/row
Arithmetic Mean	Returns the arithmetic mean of all elements from a matrix
Harmonic Mean	Returns the harmonic mean of all elements from a matrix
Geometric Mean	Returns the geometric mean of all elements from a matrix

The NMatrix structure is implemented as:

typedef double real;
typedef int integer;

typedef struct
{
   real** data;
   integer rows;
   integer columns;
}NMatrix;

The numeric matrix structure will contain information about the number of rows, columns and an dynamic 2D array to hold the data.

The prototypes for the functions are:

Operation	Prototype
Create	NMatrix* NMatrix_Create(integer rows, integer columns);
Destroy	NMatrix* NMatrix_Destroy(NMatrix *matrix);
Clone	NMatrix* NMatrix_Clone(const NMatrix *source);
Sum	NMatrix* NMatrix_Sum(const NMatrix* mat1,const NMatrix* mat2);
Scalar Multiplication	NMatrix* NMatrix_MultiplyWithScalar(const NMatrix* mat, real value);
Product	NMatrix* NMatrix_Product(const NMatrix* mat1,const NMatrix* mat2);
Secondary Diagonal	NMatrix* NMatrix_GetSecondaryDiagonal(NMatrix* mat);
Primary Diagonal	NMatrix* NMatrix_GetPrimaryDiagonal(NMatrix *mat);
Minor	NMatrix* NMatrix_Minor(const NMatrix *mat, integer row, integer column, Integer order);
Determinant	real NMatrix_Determinant(const NMatrix *mat, integer order);
Transpose	NMatrix* NMatrix_Transpose(const NMatrix* mat);
Adjugate	NMatrix* NMatrix_Adjugate(const NMatrix* mat);
Inverse	NMatrix* NMatrix_Inverse(const NMatrix* mat);
Minimum Element	real NMatrix_MinElement(const NMatrix* mat);
Maximum Element	real NMatrix_MaxElement(const NMatrix* mat);
Sum of all elements	real NMatrix_ElementSum(const NMatrix* mat);
Product of all Elements	real NMatrix_ElementProduct(const NMatrix* mat);
Number of Elements	integer NMatrix_ElementCount(const NMatrix* mat);
Submatrix	NMatrix* NMatrix_Submatrix(const NMatrix* mat, integer startRow, integer endRow, Integer startColumn, integer endColumn);
Arithmetic Mean	real NMatrix_ArithmeticMean(const NMatrix* mat);
Harmonic Mean	real NMatrix_HarmonicMean(const NMatrix* mat);
Geometric Mean	real NMatrix_GeometricMean(const NMatrix* mat);

See here the description of the functions

See here the implementations for the operations

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