GROUP00

Files
file	psSpline.h
	Standard Mathematical Functions.
file	psSpline.h
	Standard Mathematical Functions.
Data Structures
struct	psSpline1D
	One-Dimensional Spline. More...
Functions
psSpline1D *	psSpline1DAlloc (int n, int order, float min, float max)
	Allocates a psSpline1D structure.
psSpline1D *	psSpline1DAllocGeneric (const psVector *bounds, int order)
	Allocates a psSpline1D structure.
float	psSpline1DEval (const psSpline1D *spline, float x)
	Evaluates 1-D spline polynomials at a specific coordinate.
psVector *	psSpline1DEvalVector (const psSpline1D *spline, const psVector *x)
	Evaluates 1-D spline polynomials at a set of specific coordinates.
psS32	p_psVectorBinDisect (psVector *bins, psScalar *x)
	Performs a binary disection on a given vector.
psScalar *	p_psVectorInterpolate (psVector *domain, psVector *range, int order, psScalar *x)
	Interpolates a series of data points for evaluation at a specific coordinate.
bool	psMemCheckSpline1D (psPtr ptr)
	Checks the type of a particular pointer.
psSpline1D *	psVectorFitSpline1D (psSpline1D *mySpline, const psVector *x, const psVector *y, const psVector *yErr)
	Derive a one-dimensional spline fit.
psSpline1D *	psVectorFitSpline1DNEW (const psVector *x, const psVector *y, int nKnots)

---

Function Documentation

psS32 p_psVectorBinDisect (  psVector *  bins, psScalar *  x )

Performs a binary disection on a given vector. Searches through an array of data for a specified value. Returns: psS32 corresponding index number of specified value Parameters: bins  Array of non-decreasing values x  Target value to find

psScalar* p_psVectorInterpolate (  psVector *  domain, psVector *  range, int  order, psScalar *  x )

Interpolates a series of data points for evaluation at a specific coordinate. Uses a Lagrange interpolation method. Returns: psScalar* Lagrange interpolation value at given location Parameters: domain  Domain (x coords) for interpolation range  Range (y coords) for interpolation order  Order of interpolation function x  Location at which to evaluate

bool psMemCheckSpline1D (  psPtr  ptr  )

Checks the type of a particular pointer. Uses the appropriate deallocation function in psMemBlock to check the ptr datatype. Returns: bool: True if the pointer matches a psSpline1D structure, false otherwise. Parameters: ptr  the pointer whose type to check

psSpline1D* psSpline1DAlloc (  int  n, int  order, float  min, float  max )

Allocates a psSpline1D structure. Allocator for psSpline1D where the bounds are implicitly specified through specifying min and max values along with the number of splines. Returns: psSpline1D* new 1-D spline struct Parameters: n  Number of spline polynomials order  Order of spline polynomials min  Lower boundary value of spline polynomials max  Upper boundary value of spline polynomials

psSpline1D* psSpline1DAllocGeneric (  const psVector *  bounds, int  order )

Allocates a psSpline1D structure. Allocator for psSpline1D where the bounds are explicitly specified. Returns: psSpline1D* new 1-D spline struct Parameters: bounds  Bounds for spline polynomials order  Order of spline polynomials

float psSpline1DEval (  const psSpline1D *  spline, float  x )

Evaluates 1-D spline polynomials at a specific coordinate. Returns: float result of spline polynomials evaluated at given location Parameters: spline  Coefficients for spline polynomials x  location at which to evaluate

psVector* psSpline1DEvalVector (  const psSpline1D *  spline, const psVector *  x )

Evaluates 1-D spline polynomials at a set of specific coordinates. Returns: psVector* results of spline polynomials evaluated at given locations Parameters: spline  Coefficients of spline polynomials x  locations at which to evaluate

psSpline1D* psVectorFitSpline1D (  psSpline1D *  mySpline, const psVector *  x, const psVector *  y, const psVector *  yErr )

Derive a one-dimensional spline fit. Given a psSpline1D data structure and a set of x,y vectors, this routine generates the linear splines which satisfy those data points. Returns: psSpline1D*: the calculated one-dimensional splines Parameters: mySpline  The spline which will be generated. x  Ordinates (or NULL to just use the indices) y  Coordinates yErr  Errors in coordinates, or NULL

psSpline1D* psVectorFitSpline1DNEW (  const psVector *  x, const psVector *  y, int  nKnots )

Parameters: x  Ordinates (or NULL to just use the indices) y  Coordinates

---