What is the underlying algorithm of "Find threshold"

johnny5550822_1

I understand that the "Find threshold" operator uses ROC to determine the best threshold. But, what kind of algorithm it uses to select the threshold? For example, (1) optimizes the precision and recall, or (2) something like this: http://stats.stackexchange.com/questions/29719/how-to-determine-best-cutoff-point-and-its-confidence-interval-using-roc-curve-i, or (3) other

 

Thanks!

JEdward

Hi Johnny,

 

You should be able to track it down on the github.  RapidMiner Github

 

Try here: Find threshold & ROC helper class