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}