ludcmp.c File Reference

#include "mbs_errors_names.h"
#include <math.h>
#include "useful_functions.h"
#include "mbs_message.h"

Macros
#define	NRANSI
#define	TINY   1.0e-20

Functions
int	ludcmp (double **a, int n, int *indx, double *d)
	LU decomposition of a matrix with index starting at 1. More...
int	ludcmp_0 (double **a, int n, int *indx, double *d)
	LU decomposition of a matrix with index starting at 0. More...

Macro Definition Documentation

NRANSI

#define NRANSI

TINY

#define TINY   1.0e-20

Function Documentation

ludcmp()

int ludcmp	(	double **	a,
		int	n,
		int *	indx,
		double *	d
	)

LU decomposition of a matrix with index starting at 1.

Parameters

[in,out]	a	Input and output matrix with index starting at 1.
[in]	n	size of the square matrix a : [n x n] .
[out]	indx	Row permutations with index starting at 1.
[out]	d	+1 if the number of row interchange is even, -1 if it is odd.

Returns

Error status, <0 in case of failure (= 0 if no error).

ludcmp_0()

int ludcmp_0	(	double **	a,
		int	n,
		int *	indx,
		double *	d
	)

LU decomposition of a matrix with index starting at 0.

Parameters

[in,out]	a	Input and output matrix with index starting at 0.
[in]	n	size of the square matrix a : [n x n].
[out]	indx	Row permutations with index starting at 0.
[out]	d	+1 if the number of row interchange is even, -1 if it is odd.

Returns

Error status, <0 in case of failure.