OptionalbestThe criterion of "best": "youden" (default; the maximum of se + r·sp) or "closest.topleft" (the minimum of
(1 − se)² + r(1 − sp)²; "topleft" is the same); abbreviations are accepted.
Optionalbest[cost, prevalence]: the weight r = (1 − prevalence)/(cost · prevalence) of the specificity in the criteria.
The cost must be positive and the prevalence in (0, 1). Default [1, 0.5] (r = 1).
Options for coords.