Table 7. Formulae for performance metrics.

Metric	Formula
Average accuracy	${\displaystyle \frac{{\sum }_{i=1}^l{\displaystyle \frac{\mathrm{T}{\mathrm{P}}_i+\mathrm{T}{\mathrm{N}}_i}{\mathrm{T}{\mathrm{P}}_i+\mathrm{F}{\mathrm{N}}_i+\mathrm{F}{\mathrm{P}}_i+\mathrm{T}{\mathrm{N}}_i}}}{l}}$
Matthew correlation coefficient	${\displaystyle \frac{\left(\mathrm{T}\mathrm{P}\ast \mathrm{T}\mathrm{N}+\mathrm{F}\mathrm{P}\ast \mathrm{F}\mathrm{N}\right)}{\mathrm{S}\mathrm{q}\mathrm{r}\mathrm{t}\left(\left(\mathrm{T}\mathrm{P}+\mathrm{F}\mathrm{P}\right)\ast \left(\mathrm{T}\mathrm{P}+\mathrm{F}\mathrm{N}\right)\ast \left(\mathrm{T}\mathrm{N}+\mathrm{F}\mathrm{P}\right)\ast \left(\mathrm{T}\mathrm{N}+\mathrm{F}\mathrm{N}\right)\right)}}$
PrecisionM	${\displaystyle \frac{{\sum }_{i=1}^l{\displaystyle \frac{\mathrm{T}{\mathrm{P}}_i}{\left(\mathrm{T}{\mathrm{P}}_i+\mathrm{F}{\mathrm{P}}_i\right)}}}{l}}$
RecallM	${\displaystyle \frac{{\sum }_{i=1}^l{\displaystyle \frac{\mathrm{T}{\mathrm{P}}_i}{\left(\mathrm{T}{\mathrm{P}}_i+\mathrm{F}{\mathrm{N}}_i\right)}}}{l}}$
F1 scoreM	${\displaystyle \frac{2\ast \mathrm{P}\mathrm{r}\mathrm{e}\mathrm{c}\mathrm{i}\mathrm{s}\mathrm{i}\mathrm{o}{\mathrm{n}}_{\mathrm{M}}\ast \mathrm{R}\mathrm{e}\mathrm{c}\mathrm{a}\mathrm{l}{\mathrm{l}}_{\mathrm{M}}}{\mathrm{P}\mathrm{r}\mathrm{e}\mathrm{c}\mathrm{i}\mathrm{s}\mathrm{i}\mathrm{o}{\mathrm{n}}_{\mathrm{M}}+\mathrm{R}\mathrm{e}\mathrm{c}\mathrm{a}\mathrm{l}{\mathrm{l}}_{\mathrm{M}}}}$

Note:

l denotes class levels, M denotes macro-averaging metrics, TP means true positive, FP denotes false positive, FN means false negative, and TN denotes true negative.