pairwise_count: Count pairs of items within a group

In dgrtwo/widyr: Widen, Process, then Re-Tidy Data

Count pairs of items within a group

Description

Count the number of times each pair of items appear together within a group defined by "feature." For example, this could count the number of times two words appear within documents).

Usage

pairwise_count(tbl, item, feature, wt = NULL, ...)

pairwise_count_(tbl, item, feature, wt = NULL, ...)

Arguments

tbl	Table
item	Item to count pairs of; will end up in item1 and item2 columns
feature	Column within which to count pairs item2 columns
wt	Optionally a weight column, which should have a consistent weight for each feature
...	Extra arguments passed on to squarely, such as diag, upper, and sort

See Also

squarely()

Examples

library(dplyr)
dat <- tibble(group = rep(1:5, each = 2),
              letter = c("a", "b",
                         "a", "c",
                         "a", "c",
                         "b", "e",
                         "b", "f"))

# count the number of times two letters appear together
pairwise_count(dat, letter, group)
pairwise_count(dat, letter, group, sort = TRUE)
pairwise_count(dat, letter, group, sort = TRUE, diag = TRUE)

dgrtwo/widyr documentation built on Nov. 14, 2022, 4:07 a.m.