//
// Define statistics functions.
//

typedef struct {
    double *data;
    long cells;
    double count;
    double min, max, range;
    double first, last, span, ramp;
    double mean, sdev;
    double adev;
    double xmean;
    double slope, r, steyx, slope_sdev, sn;
    double offset2, slope2, drift2, sdev2;
    double offset, scale;
    char *units;
} STAT, *PSTAT;

double stat_adev (double phase[], long count);
void stat_calc (PSTAT p);
void stat_data(PSTAT p, double v);
void stat_dump (PSTAT p);
void stat_free (PSTAT p);
void stat_init (PSTAT p);
void stat_line_fit (PSTAT p, PSTAT r);
void stat_quad_fit (PSTAT p, PSTAT r);