Challisd

Hello.

Please note proper mathematical notation coding:

$J={true\_positives \over true\_positives+false\_negatives}+{true\_negatives \over true\_negatives+false\_positives}-1$

${}$

$J={\frac {\text{true positives}}{{\text{true positives}}+{\text{false negatives}}}}+{\frac {\text{true negatives}}{{\text{true negatives}}+{\text{false positives}}}}-1$

Michael Hardy (talk) 19:47, 7 June 2017 (UTC)