id: Compute a unique numeric id for each unique row in a data...

View source: R/id.r

idR Documentation

Compute a unique numeric id for each unique row in a data frame.

Description

Properties:

  • order(id) is equivalent to do.call(order, df)

  • rows containing the same data have the same value

  • if drop = FALSE then room for all possibilites

Usage

id(.variables, drop = FALSE)

Arguments

.variables

list of variables

drop

drop unusued factor levels?

Value

a numeric vector with attribute n, giving total number of possibilities

See Also

id_var


plyr documentation built on Oct. 2, 2023, 9:07 a.m.

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