Measure to compare two or more sets w.r.t. their similarity.
This Measure can be instantiated via the dictionary mlr_measures or with the associated sugar function msr():
mlr_measures$get("sim.jaccard")
msr("sim.jaccard")
Type: "similarity"
Range: \([0, 1]\)
Minimize: FALSE
For two sets \(A\) and \(B\), the Jaccard Index is defined as $$ J(A, B) = \frac{|A \cap B|}{|A \cup B|}. $$ If more than two sets are provided, the mean of all pairwise scores is calculated.
This measure is undefined if two or more sets are empty.
Dictionary of Measures: mlr_measures
as.data.table(mlr_measures) for a complete table of all (also dynamically created) Measure implementations.
Other similarity measures:
mlr_measures_sim.phi