Challenges in the real world use of classification accuracy metrics: From recall and precision to the Matthews correlation coefficient
Fig 7
Relationship of apparent MCC with prevalence for a poor classification (Recall = Specificity = 0.5, J = 0) assessed with an imperfect reference (Recall = Specificity = 0.7) containing correlated errors.
The true relationship, obtained using a gold standard reference, is also shown for comparative purposes with a dashed black line.