matrixcomp.c
https://github.com/GianlucaMancusi/matrix_computation
This github project is created by Gianluca Mancusi, Daniele Manicardi, Gianmarco Lusvardi – from the “Enzo Ferrari” Department of Engineering. Some useful Matrix Calculation tools optimized for each system.
This C library is designed to perform calculations on matrix. Here are some of the cool features:
- Determinant of a square matrix (Laplace’s method)
- Possibility to reduce a matrix in rowEchelonForm
- In-situ matrix transposition (uses a lightweight auxiliary table to perform it on rectangular matrices)
- Fast matrix row edits (matrices are stored by rows)
- Matrix multiplication
We are pleased to receiving support!
//====== Useful functions =======
Calculates the determinant of any squared matrix of any dimension (NxN):
extern double det(const struct matrix *matr);
Reduce a matrix in row echelon form. For more information see Wikipedia
extern void rowEchelonForm(struct matrix *matr);
Transpose the input matrix (very fast):
extern void transposeMatrix(struct matrix *matr);
Multiply two compatible matrices:
extern struct matrix *mulmatr(const struct matrix *lhs, const struct matrix *rhs);
Creates a new matrix in the single pointer format:
extern struct matrix *creatematr(size_t rows, size_t cols);
Create a new empty matrix in the single pointer format:
extern struct matrix *createemptymatr(size_t rows, size_t cols);
Create a new “cloned from other” matrix in the single pointer format:
extern struct matrix *creatematrfrom(const double* matr, size_t row, size_t col);
Clone a matrix:
extern struct matrix *clonematr(const struct matrix* matr);
This feature allows you to find the complementary minor given rows and columns:
extern struct matrix* matrcompminor(const struct matrix *matr, int row, int col);
Change an entire row:
extern int matrrow(const struct matrix* matr, size_t rowid, const double *row);
Destroy and free memory of an allocated matrix:
extern void destroymatr(struct matrix* matr);
Fast way to access an element of a matrix without thinking too much about it:
extern double *elementAt(struct matrix *matr, size_t rowIndex, size_t colIndex);
Print to File a matrix (to print on screen use “stdout” standard file):
extern void printMatrix(struct matrix *matr, FILE *f);
