MSLE

173. MSLE

When predictions and actual values span several orders of magnitude

MSLE = \frac{1}{𝑛} \sum_{𝑖 = 1}^{𝑛} {(log (1 + 𝑦_{𝑖}) - log (1 + {\hat{𝑦}}_{𝑖}))}^{2}