| 1 |
schorsch |
2.5 |
/* RCSid $Id: linregr.h,v 2.4 2003/02/25 02:47:21 greg Exp $ */
|
| 2 |
greg |
1.1 |
/*
|
| 3 |
|
|
* Header file for linear regression calculation.
|
| 4 |
|
|
*/
|
| 5 |
schorsch |
2.5 |
#ifndef _RAD_LINEGR_H_
|
| 6 |
|
|
#define _RAD_LINEGR_H_
|
| 7 |
|
|
#ifdef __cplusplus
|
| 8 |
|
|
extern "C" {
|
| 9 |
|
|
#endif
|
| 10 |
greg |
1.1 |
|
| 11 |
greg |
2.4 |
#include "copyright.h"
|
| 12 |
greg |
2.3 |
|
| 13 |
greg |
1.1 |
typedef struct {
|
| 14 |
|
|
double xs, ys, xxs, yys, xys;
|
| 15 |
|
|
int n;
|
| 16 |
|
|
} LRSUM;
|
| 17 |
|
|
|
| 18 |
|
|
typedef struct {
|
| 19 |
|
|
double slope, intercept, correlation;
|
| 20 |
|
|
} LRLIN;
|
| 21 |
|
|
|
| 22 |
|
|
#define lrpoint(x,y,l) ((l)->xs+=(x),(l)->ys+=(y),(l)->xxs+=(x)*(x), \
|
| 23 |
|
|
(l)->yys+=(y)*(y),(l)->xys+=(x)*(y),++(l)->n)
|
| 24 |
|
|
|
| 25 |
|
|
#define lrxavg(l) ((l)->xs/(l)->n)
|
| 26 |
|
|
#define lryavg(l) ((l)->ys/(l)->n)
|
| 27 |
|
|
#define lrxvar(l) (((l)->xxs-(l)->xs*(l)->xs/(l)->n)/(l)->n)
|
| 28 |
|
|
#define lryvar(l) (((l)->yys-(l)->ys*(l)->ys/(l)->n)/(l)->n)
|
| 29 |
|
|
#define lrxdev(l) sqrt(((l)->xxs-(l)->xs*(l)->xs/(l)->n)/((l)->n-1))
|
| 30 |
|
|
#define lrydev(l) sqrt(((l)->yys-(l)->ys*(l)->ys/(l)->n)/((l)->n-1))
|
| 31 |
greg |
2.3 |
|
| 32 |
|
|
|
| 33 |
|
|
extern void lrclear(LRSUM *l);
|
| 34 |
|
|
extern int flrpoint(double x, double y, LRSUM *l);
|
| 35 |
|
|
extern int lrfit(LRLIN *r, LRSUM *l);
|
| 36 |
|
|
|
| 37 |
schorsch |
2.5 |
|
| 38 |
|
|
#ifdef __cplusplus
|
| 39 |
|
|
}
|
| 40 |
greg |
2.3 |
#endif
|
| 41 |
schorsch |
2.5 |
#endif /* _RAD_LINEGR_H_ */
|
| 42 |
|
|
|
