E. Interpolation (Hermite / cubic spline interpolation)

Functions
void	chfdv (double x1, double x2, double f1, double f2, double d1, double d2, int ne, double xe[], double fe[], double de[], int next[], int *info)
	Cubic Hermite function and derivative values
void	chfev (double x1, double x2, double f1, double f2, double d1, double d2, int ne, double xe[], double fe[], int next[], int *info)
	Cubic Hermite function values
void	pchbs (int n, double x[], double f[], double d[], int incfd, int knotyp, int *nknots, double t[], double bcoef[], int *ndim, int *kord, int *info)
	Piecewise cubic Hermite to B-spline conversion
void	pchcm (int n, double x[], double f[], double d[], int incfd, int skip, int ismon[], int *info)
	Monotonicity check for piecewise cubic Hermite function
void	pchfd (int n, double x[], double f[], double d[], int incfd, int skip, int ne, double xe[], double fe[], double de[], int *info)
	Evaluation of function and derivative values for piecewise cubic Hermite (and cubic spline) interpolation
void	pchfe (int n, double x[], double f[], double d[], int incfd, int skip, int ne, double xe[], double fe[], int *info)
	Evaluation of function values for piecewise cubic Hermite (and cubic spline) interpolation
void	pchic (int ic[], double vc[], double sw, int n, double x[], double f[], double d[], int incfd, double work[], int lwork, int *info)
	Piecewise cubic Hermite interpolation
void	pchim (int n, double x[], double f[], double d[], int incfd, int *info)
	Piecewise cubic Hermite interpolation (default boundary conditions)
void	pchse (int n, double x[], double f[], double d[], int incfd, double work[], int lwork, int *info)
	Piecewise cubic spline interpolation ("not a knot" condition)
void	pchsp (int ic[], double vc[], int n, double x[], double f[], double d[], int incfd, double work[], int lwork, int *info)
	Piecewise cubic spline interpolation

Detailed Description

This is the group of E. Interpolation (Piecewise cubic Hermite interpolation / cubic spline interpolation).