Table 2 Best subset analysis to optimally chosen the input combination of EC in ML models.
Combinations | R2% | R2-Ajd% | Cp | PC | |
|---|---|---|---|---|---|
1 | ECt−1 | 0.474 | 0.473 | 90.660 | 0.528 |
2 | Q/ECt−1 | 0.550 | 0.547 | 18.365 | 0.455 |
3 | Q/ECt−4/ECt−1 | 0.563 | 0.560 | 6.770 | 0.443 |
4 | Qt−2/Q/ECt−4/ECt−1 | 0.567 | 0.563 | 4.678 | 0.441 |
5 | Qt−2/Q/ECt−4/ECt−2/ECt−1 | 0.569 | 0.564 | 4.741 | 0.441 |
6 | Qt−2/Qt−1/Q/ECt−4/ECt−2/ECt−1 | 0.570 | 0.564 | 6.119 | 0.442 |
7 | Qt−2/Qt−1/Q/ECt−4/ECt−3/ECt−2/ECt−1 | 0.570 | 0.563 | 8.000 | 0.444 |
