Table 3.
MARE and RMSPE LOOCV results for nine IDW methods with a maximum of three and four nearest neighbors using the improved IDW interpolation.
| Exponent | MARE: n = 3 | MARE:n=4 | RMSPE:n=3 | RMSPE:n=4 |
|---|---|---|---|---|
| 1.0 | 0.37027 | 0.38444 | 242.1428 | 279.8240 |
| 1.5 | 0.36641 | 0.37664 | 210.7435 | 241.7803 |
| 2.0 | 0.36423 | 0.37154 | 185.4772 | 208.6938 |
| 2.5 | 0.36302 | 0.36816 | 167.2276 | 182.7473 |
| 3.0 | 0.36240 | 0.36595 | 155.4234 | 164.5911 |
| 3.5 | 0.36214 | 0.36454 | 148.5401 | 153.2638 |
| 4.0 | 0.36209 | 0.36367 | 144.8794 | 146.9017 |
| 4.5 | 0.36219 | 0.36317 | 143.0899 | 143.6380 |
| 5.0 | 0.36237 | 0.36294 | 142.2915 | 142.0947 |