ludcmp.c File Reference

#include <math.h>
#include <stdio.h>
#include <stdlib.h>

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

Function Documentation

ludcmp()

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

Given a matrix a[0..n-1][0..n-1], this routine replaces it by the LU decomposition of a rowwise permutation of itself. a and n are input. a is output, arranged as in NRIC equation (2.3.14) ; indx[0..n-1] is an output vector that records the row permutation effected by the partial pivoting; d is output as +/- 1 depending on whether the number of row interchanges was evenor odd, respectively. This routine is used in combination with lubksbto solve linear equationsor invert a matrix. adapted from Numerical Recipes in C, 2nd Ed., p. 46.

Definition at line 14 of file ludcmp.c.