- at each point a relevant result is returned, calculate precision
- and then average that
- and then average the precision over all queries
precision
\begin{equation} \frac{tp}{tp + fp} \end{equation}
recall
\begin{equation} \frac{tp}{tp+fn} \end{equation}
accuracy
\begin{equation} \frac{tp + tn}{tp+tn+fp+fn} \end{equation}
f1
\begin{equation} F_1 = \frac{2 (P\cdot R)}{P+R} \end{equation}