tabulate_patterns: Create a table of comparison patterns
In reclin: Record Linkage Toolkit

Description Usage Arguments Details Value Examples

Create a table of comparison patterns

1	tabulate_patterns(pairs, ..., comparators = NULL, by = NULL)

`pairs`	a `pairs` object, such as generated by `pair_blocking`
`...`	passed on to other methods.
`comparators`	a list with comparison functions for each of the columns. When missing or `NULL`, `attr(pairs, "comparators")` is used. Therefore, this parameter usually does not need to be specified.
`by`	the columns that should be used for the comparison vectors. When missing or `NULL`, `attr(pairs, "by")` is used. Therefore, this parameter usually does not need to be specified.

Since comparison vectors can contain continuous numbers (usually between 0 and 1), this could result in a very large number of possible comparison vectors. Therefore, the comparison vectors are passed on to the comparators in order to threshold them. This usually results in values 0 or 1. Missing values are usually codes as 0. However, this all depends on the comparison functions used. For more information see the documentation on the comparison functions.

Returns a data.frame with all unique comparison patterns that exist in pairs, with a column n added with the number of times each pattern occurs.

data("linkexample1", "linkexample2")
pairs <- pair_blocking(linkexample1, linkexample2, "postcode")
pairs <- compare_pairs(pairs, c("lastname", "firstname", "address", "sex"))
tabulate_patterns(pairs)