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Statistic overview and results of the ψstem (MPa) estimation using a rotation forest and M5 trees.
| 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.
