Equation 2
\begin{equation}
\text{MDPE}_{\text{i\ }}(\%)=median\ \{\text{PE}_{\text{ij}},\ j=1,\ldots,\ N_{i}\}\nonumber \\
\end{equation}To assess inaccuracy (i.e. size of the typical miss) median absolute
prediction error (MDAPE) was determined with Equation 3.