ClustEval clustering evaluation framework
The Sensitivity relates the number of true positives to the total number of true elements. This estimates a likelihood of an element being classified as positive, if it is a positive element. This measure is based on the pairwise approach to calculate TP,TN,FP and FN. $Sensitivity = \frac{TP}{TP+FN}$ In the binary classification background we have two classes that we want to distinguish: positive and negative. In this scenario there are four possible outcomes: