Table 2 Classwise performance measures

Sensitivity, recall, true positive rate

\({= \frac {\text {TP}}{\text {TP}+\text {FN}} = \frac {\text {TP}}{n^{+}}}\)

Specificity, true negative rate

\({= \frac {\text {TN}}{\text {TN}+\text {FP}}= \frac {\text {TN}}{n^{-}}}\)

Positive predictive value, precision

\({= \frac {\text {TP}}{\text {TP}+\text {FP}}}\)

Negative predictive value

\({= \frac {\text {TN}}{\text {TN}+\text {FN}}}\)

False positive rate, fallout

\({= \frac {\text {FP}}{\text {FP}+\text {TN}} = \frac {\text {FP}}{n^{-}}}\)

False discovery rate

\({= \frac {\text {FP}}{\text {FP}+\text {TP}}}\)