RowGroups: Create numbering according to unique rows

In SSBtools: Algorithms and Tools for Tabular Statistics and Hierarchical Computations

Create numbering according to unique rows

Description

Create numbering according to unique rows

Usage

RowGroups(
  x,
  returnGroups = FALSE,
  returnGroupsId = FALSE,
  NAomit = FALSE,
  pkg = "base"
)

Arguments

x	Data frame or matrix
returnGroups	When TRUE unique rows are returned
returnGroupsId	When TRUE Index of unique rows are returned
NAomit	When TRUE, rows containing NAs are omitted, and the corresponding index numbers are set to NA.
pkg	A character string indicating which package to use. Must be either "base" for base R or "data.table" for data.table. Default is "base".

Value

A vector with the numbering or, according to the arguments, a list with more output.

Author(s)

Øyvind Langsrud

Examples

a <- data.frame(x = c("a", "b"), y = c("A", "B", "A"), z = rep(1:4, 3))
RowGroups(a)
RowGroups(a, TRUE)
RowGroups(a[, 1:2], TRUE, TRUE)
RowGroups(a[, 1, drop = FALSE], TRUE)

SSBtools documentation built on Aug. 18, 2025, 9:07 a.m.