findroot.c File Reference

#include <math.h>
#include "findroot.h"

Include dependency graph for findroot.c:

Macros
#define	SIGN(a, b)   ((b) >= 0.0 ? fabs(a) : -fabs(a))
#define	MAXIT   60

Functions
int	findroot_Newton (double x1, double x2, double *rts, double xacc, newton_callback func, void *p)
	Finds the root of a function using Newton's method.
double	findroot_Ridder (double x1, double x2, double xacc, ridder_callback func, void *p)
	Finds the root of a function using Ridder's method.

Macro Definition Documentation

MAXIT

#define MAXIT   60

SIGN

#define SIGN	(		a,
			b
	)		((b) >= 0.0 ? fabs(a) : -fabs(a))

Function Documentation

findroot_Newton()

int findroot_Newton	(	double	x1,
		double	x2,
		double *	rts,
		double	xacc,
		newton_callback	func,
		void *	p
	)

Finds the root of a function using Newton's method.

Parameters

x1	Lower bound of the bracketing interval.
x2	Upper bound of the bracketing interval.
rts	Pointer to the root.
xacc	Desired accuracy of the root.
func	Callback function for the function and its derivative.
p	Pointer to additional data.

Returns

Number of function evaluations used or 0 if the maximum allowed iterations were exceeded.

findroot_Ridder()

double findroot_Ridder	(	double	x1,
		double	x2,
		double	xacc,
		ridder_callback	func,
		void *	p
	)

Finds the root of a function using Ridder's method.

Parameters

x1	Lower bound of the bracketing interval.
x2	Upper bound of the bracketing interval.
xacc	Desired accuracy of the root.
func	Callback function for the function.
p	Pointer to additional data.

Returns

The root of the function.