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/*
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poly.h
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*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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*
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* Part of: A program using polynomial fits
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*
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* Author: E.BERTIN (IAP)
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*
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* Contents: Include for poly.c
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*
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* Last modify: 03/03/2004
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*
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*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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*/
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#ifndef _POLY_H_
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#define _POLY_H_
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/*--------------------------------- constants -------------------------------*/
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#define POLY_MAXDIM 4 /* Max dimensionality of polynom */
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#define POLY_MAXDEGREE 10 /* Max degree of the polynom */
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/*---------------------------------- macros ---------------------------------*/
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/*--------------------------- structure definitions -------------------------*/
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typedef struct poly
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{
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double *basis; /* Current values of the basis functions */
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double *coeff; /* Polynom coefficients */
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int ncoeff; /* Number of coefficients */
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int *group; /* Groups */
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int ndim; /* dimensionality of the polynom */
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int *degree; /* Degree in each group */
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int ngroup; /* Number of different groups */
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} polystruct;
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/*---------------------------------- protos --------------------------------*/
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extern polystruct *poly_init(int *group,int ndim,int *degree,int ngroup);
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extern double poly_func(polystruct *poly, double *pos);
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extern int cholsolve(double *a, double *b, int n),
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*poly_powers(polystruct *poly);
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extern void poly_addcste(polystruct *poly, double *cste),
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poly_end(polystruct *poly),
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poly_fit(polystruct *poly, double *x, double *y,
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double *w, int ndata, double *extbasis),
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poly_solve(double *a, double *b, int n),
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svdsolve(double *a, double *b, int m, int n,
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double *vmat, double *wmat);
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#endif
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