fct_shift: Shift factor levels to left or right, wrapping around at end

In sindribaldur/poorcats: Tools for Working with Categorical Variables (Factors)

Description

This is useful when the levels of an ordered factor are actually cyclical, with different conventions on the starting point.

Usage

fct_shift(f, n = 1L)

Arguments

f	A factor.
n	Positive values shift to the left; negative values shift to the right.

Examples

x <- factor(
  c("Mon", "Tue", "Wed"),
  levels = c("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"),
  ordered = TRUE
)
x
fct_shift(x)
fct_shift(x, 2)
fct_shift(x, -1)

sindribaldur/poorcats documentation built on Feb. 26, 2021, 12:27 a.m.