/*----------------------------------------------------------------------  File    : nstats.h  Contents: management of normalization statistics  Author  : Christian Borgelt  History : 12.08.2003 file created            12.08.2004 description and parse function added----------------------------------------------------------------------*/#ifndef __NSTATS__#define __NSTATS__#include <stdio.h>#ifdef NST_PARSE#include "parse.h"#endif/*----------------------------------------------------------------------  Type Definitions----------------------------------------------------------------------*/typedef struct {                /* --- numerical statistics --- */  int    dim;                   /* dimension of data space */  double reg;                   /* number of registered patterns */  double *mins;                 /* minimal data values */  double *maxs;                 /* maximal data values */  double *sums;                 /* sums of data values */  double *sqrs;                 /* sums of squared data values */  double *offs;                 /* offsets for data scaling */  double facs[1];               /* factors for data scaling */} NSTATS;                       /* (numerical statistics) *//*----------------------------------------------------------------------  Functions----------------------------------------------------------------------*/extern NSTATS* nst_create (int dim);extern void    nst_delete (NSTATS *nst);extern int     nst_dim    (NSTATS *nst);extern void    nst_reg    (NSTATS *nst, const double *vec,                           double weight);extern void    nst_range  (NSTATS *nst, int idx,                           double min, double max);extern void    nst_expand (NSTATS *nst, int idx, double factor);extern void    nst_scale  (NSTATS *nst, int idx,                           double off, double fac);extern double  nst_min    (NSTATS *nst, int idx);extern double  nst_max    (NSTATS *nst, int idx);extern double  nst_offset (NSTATS *nst, int idx);extern double  nst_factor (NSTATS *nst, int idx);extern void    nst_norm   (NSTATS *nst, const double *vec, double *res);extern void    nst_inorm  (NSTATS *nst, const double *vec, double *res);extern void    nst_center (NSTATS *nst, double *vec);extern void    nst_spans  (NSTATS *nst, double *vec);extern int     nst_desc   (NSTATS *nst, FILE *file,                           const char *indent, int maxlen);#ifdef NST_PARSEextern NSTATS* nst_parse  (SCAN *scan, int dim);#endif/*----------------------------------------------------------------------  Preprocessor Definitions----------------------------------------------------------------------*/#define nst_dim(s)        ((s)->dim)#define nst_min(s,i)      ((s)->mins[i])#define nst_max(s,i)      ((s)->maxs[i])#define nst_offset(s,i)   ((s)->offs[i])#define nst_factor(s,i)   ((s)->facs[i])#endif