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ribiosUtils (version 1.7.7)

pairwiseJaccardIndex: Calculate pairwise Jaccard Indices between each pair of items in a list

Description

Calculate pairwise Jaccard Indices between each pair of items in a list

Usage

pairwiseJaccardIndex(list)
pairwiseJaccardDistance(list)

Value

A symmetric matrix of dimension mxm, where m is the length of the list

pairwiseJaccardDistance is defined as 1-pairwiseJaccardIndex.

Arguments

list

A list

Examples

Run this code

myList <- list(first=LETTERS[3:5], second=LETTERS[1:3], third=LETTERS[1:5], fourth=LETTERS[6:10])
pairwiseJaccardIndex(myList)

poormanPJI <- function(list) {
  sapply(list, function(x) sapply(list, function(y) jaccardIndex(x,y)))
}
stopifnot(identical(pairwiseJaccardIndex(myList), poormanPJI(myList)))

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