Table 6.
Statistics | Rotation Forest and M5 Trees | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Calibration (n = 94) | 5-Fold Cross-Validation (n = 94) | External Validation (n = 24) | ||||||||
n | Min | Max | Mean | SD | R2 | RMSE | R2 | RMSE | R2 | RMSE |
118 | −1.85 | −0.42 | −1.03 | 0.396 | 0.97 | 0.083 | 0.84 | 0.164 | 0.84 | 0.165 |
n: number of samples; Min: minimum; Max: maximum; SD: standard deviation; RMSE: root-mean-square error in MPa.