Figure 3
From: Machine learning and atomistic origin of high dielectric permittivity in oxides

Distribution of ionic contribution to the frequency and permittivity of the smallest optical mode. Colors are the predicted results of random forest classification. Red circles indicate that the model predicted ωopt2 ≤ 0, blue circles indicate 0 < ωopt ≤ 2 THz, and green circles indicate ωopt > 2 THz.