Table 1.
The processing results of characteristic variables by BIPLS.
| Interval Number | Selected Interval | RMSECV | Variable Numbers | Interval Number | Selected Interval | RMSECV | Variable Numbers |
|---|---|---|---|---|---|---|---|
| 20 | 6 | 0.274 | 400 | 10 | 3 | 0.255 | 200 |
| 19 | 16 | 0.270 | 380 | 9 | 1 | 0.255 | 180 |
| 18 | 19 | 0.266 | 360 | 8 | 20 | 0.254 | 160 |
| 17 | 7 | 0.265 | 340 | 7 | 12 | 0.246 | 140 |
| 16 | 17 | 0.262 | 320 | 6 | 10 | 0.241 | 120 |
| 15 | 8 | 0.256 | 300 | 5 | 11 | 0.236 | 100 |
| 14 | 5 | 0.255 | 280 | 4 | 14 | 0.233 | 80 |
| 13 | 4 | 0.254 | 260 | 3 | 13 | 0.240 | 60 |
| 12 | 2 | 0.253 | 240 | 2 | 9 | 0.260 | 40 |
| 11 | 18 | 0.254 | 220 | 1 | 15 | 0.435 | 20 |
Intervals number, the number of intervals in the model; Selected interval, the interval selected by the BIPLS; RMSECV, root mean square error cross validation; Variable numbers, the number of variables in the model.