/* GNUPLOT - matrix.h */

/*  NOTICE: Change of Copyright Status
 *
 *  The author of this module, Carsten Grammes, has expressed in
 *  personal email that he has no more interest in this code, and
 *  doesn't claim any copyright. He has agreed to put this module
 *  into the public domain.
 *
 *  Lars Hecking  15-02-1999
 */

/*
 *	Header file: public functions in matrix.c
 *
 *
 *	Previous copyright of this module:   Carsten Grammes, 1993
 *      Experimental Physics, University of Saarbruecken, Germany
 */


#ifndef MATRIX_H
#define MATRIX_H

#include "syscfg.h"

/******* public functions ******/

double  *vec(int n);
int     *ivec(int n);
double  **matr(int r, int c);
void    free_matr(double **m);
double  *redim_vec(double **v, int n);
void    solve(double **a, int n, double **b, int m);
void    Givens(double **C, double *d, double *x, int N, int n);
void    Invert_RtR(double **R, double **I, int n);

/* Functions for use by THIN_PLATE_SPLINES_GRID method */
void    lu_decomp(double **, int, int *, double *);
void    lu_backsubst(double **, int n, int *, double *);

double   enorm_vec(int n, const double *x);
double   sumsq_vec(int n, const double *x);

#endif /* MATRIX_H */