Economic and Environmental Geology

Fig. 6.

Fig. 6. Pearson correlation coefficients (r) between the measured and predicted values using the validation data (n=30) at different sampling densities for training (n=30 to 107 in Table 2): (a) As, (b) Pb.

Econ. Environ. Geol. 2022;55:353-66 https://doi.org/10.9719/EEG.2022.55.4.353