Precision=TP/(TP+FP)

Recall=P_c=Sensitivity= TP/(TP+FN)

P_m=FN/(TP+FN)=1-Recall

P_f=FP/(FP+TN)=1-Specificity

Specificity=TN/(TN+FP)

Curves

Precision-recall curve (P vs. R)

Decision error tradeoff (DET) curve (P_f vs. P_m)

Receiver operating curve (ROC) curve (P_f vs. P_c)