Table 10 Statistical metrics for the training, testing, and forecasting performance of the model (3) for pH, TDS, EC, and Na\(^+\).
Parameter | Statistical Measures | \(\textrm{G}_{1}\) | \(\textrm{G}_{2}\) | \(\textrm{G}_{3}\) | \(\textrm{G}_{4}\) |
|---|---|---|---|---|---|
pH | \(\textrm{R}^{2}\) Train | 0.980 | 0.984 | 0.981 | 0.991 |
\(\textrm{R}^{2}\) Test | 0.957 | 0.954 | 0.960 | 0.954 | |
\(\textrm{R}^{2}\) Forecast | 0.961 | 0.966 | 0.958 | 0.947 | |
MSE | 0.049 | 0.023 | 0.027 | 0.042 | |
TDS | \(\textrm{R}^{2}\) Train | 0.980 | 0.984 | 0.983 | 0.980 |
\(\textrm{R}^{2}\) Test | 0.958 | 0.969 | 0.963 | 0.953 | |
\(\textrm{R}^{2}\) Forecast | 0.946 | 0.964 | 0.948 | 0.944 | |
MSE | 0.044 | 0.045 | 0.012 | 0.054 | |
EC | \(\textrm{R}^{2}\) Train | 0.988 | 0.981 | 0.983 | 0.981 |
\(\textrm{R}^{2}\) Test | 0.966 | 0.958 | 0.950 | 0.955 | |
\(\textrm{R}^{2}\) Forecast | 0.951 | 0.952 | 0.947 | 0.948 | |
MSE | 0.016 | 0.018 | 0.027 | 0.079 | |
Na\(^+\) | \(\textrm{R}^{2}\) Train | 0.985 | 0.983 | 0.987 | 0.986 |
\(\textrm{R}^{2}\) Test | 0.965 | 0.952 | 0.967 | 0.955 | |
\(\textrm{R}^{2}\) Forecast | 0.960 | 0.957 | 0.949 | 0.948 | |
MSE | 0.032 | 0.066 | 0.024 | 0.014 |
