| # | Line 15 | Line 15 | typedef struct { | |
|---|---|---|
| 15 | double slope, intercept, correlation; | |
| 16 | } LRLIN; | |
| 17 | ||
| 18 | – | extern double sqrt(); |
| 19 | – | |
| 18 | #define lrpoint(x,y,l) ((l)->xs+=(x),(l)->ys+=(y),(l)->xxs+=(x)*(x), \ | |
| 19 | (l)->yys+=(y)*(y),(l)->xys+=(x)*(y),++(l)->n) | |
| 20 | ||
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