math.tools.c File Reference

functions that don't depend upon any global things More...

#include "decs.h"

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Macros
#define	DO_ASSERTS   0
#define	max_interp_order   6

Functions
FTYPE	interpn (int order, FTYPE x_eval, FTYPE x1, FTYPE f1, FTYPE x2, FTYPE f2, FTYPE x3, FTYPE f3, FTYPE x4, FTYPE f4, FTYPE x5, FTYPE f5, FTYPE x6, FTYPE f6)
	Description: Constructs a second-order polynomial interpolating the set of points {x#, f#}, #=1..3 and evaluates it at the point x. More...
FTYPE	roundprecision (FTYPE value, int precision)
	round to a certain precision in base 10 to avoid round off errors More...
void	interpfun (int interptype, int numpoints, int i, FTYPE pos, FTYPE *xfun, FTYPE *fun, FTYPE *answer)
	to use generically (e.g. More...

Detailed Description

functions that don't depend upon any global things

Definition in file math.tools.c.

Macro Definition Documentation

#define DO_ASSERTS   0

Definition at line 10 of file math.tools.c.

#define max_interp_order   6

Function Documentation

void interpfun	(	int	interptype,
		int	numpoints,
		int	i,
		FTYPE	pos,
		FTYPE *	xfun,
		FTYPE *	fun,
		FTYPE *	answer
	)

to use generically (e.g.

for parabolic interpolation), call like: interpfun(QUADRATICTYPE,3,1,realposition,array from 0 of positions, array from 0 of values, output of answer);

Definition at line 91 of file math.tools.c.

FTYPE interpn	(	int	order,
		FTYPE	x_eval,
		FTYPE	x1,
		FTYPE	f1,
		FTYPE	x2,
		FTYPE	f2,
		FTYPE	x3,
		FTYPE	f3,
		FTYPE	x4,
		FTYPE	f4,
		FTYPE	x5,
		FTYPE	f5,
		FTYPE	x6,
		FTYPE	f6
	)

Description: Constructs a second-order polynomial interpolating the set of points {x#, f#}, #=1..3 and evaluates it at the point x.

Interpolation is performed using the standard Lagrange method. Arguments: x_eval – abscissa of a point where an interpolated value is to be evaluated x1, x2, x3 – set of abscissas; should all be different; can come in any order f1, f2, f3 – set of function values at the above abscissas, i.e. f# = f( x# ), # = 1..3

Definition at line 20 of file math.tools.c.

FTYPE roundprecision	(	FTYPE	value,
		int	precision
	)

round to a certain precision in base 10 to avoid round off errors

Definition at line 73 of file math.tools.c.