Jaccard similarity of two token sets

Returns 0.0 if both sets are empty, otherwise the size of the intersection divided by the size of the union, rounded to 3 decimals.

Usage

tf_jaccard(a, b)

Arguments

a, b

Character vectors of tokens (treated as sets).

Value

A numeric similarity in [0, 1].

Examples

tf_jaccard(tf_tokens("arousal threat response"),
           tf_tokens("threat appraisal response"))
#> [1] 0.5