Non-Classification Metrics
mse Mean Squared Error

rmse Root Mean Squared Error

mae Mean Absolute Error

bias Total (Bias) Error

mbe Mean (Bias) Error

r2 Pearson Correlation Coefficient

mape Mean Absolute Percentage Error

smape Symmetric Mean Absolute Percentage Error

msle Mean Squared Log Error

rmsle Root Mean Squared Log Error

rpd Ratio of Performance to Deviation

iic Index of Ideality of Correlation

ccc Concordance Correlation Coefficient

huber Huber Loss

phl Pseudo-Huber Loss

pll Poisson Log Loss

rpiq Ratio of Performance to Interquartile Range

r2ss Traditional R^2