stackoverflow: invinteraction – R documentation

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invinteraction

Split an interaction'ed factor back into seperate variables

Description

Inverse of interaction

Usage

invinteraction(fac, ..., sep = ".")

Arguments

`fac`	the factor to split
`...`	optional, names for variables
`sep`	the seperator between levels

Value

a data.frame of factors

Changes

Refactored to process the levels vector, rather than entire factor vector.

Author(s)

42, Neal Fultz

References

http://stackoverflow.com/a/10521926/986793

Examples

f1 <- gl(2, 3)
f2 <- gl(3, 2)
invinteraction(f1:f2, sep=':') 

ppl <- interaction(
  eyes = as.factor(sample(colors(), 10)),
  hair = as.factor(sample(colors(), 10))
  )
str(invinteraction(ppl, "eyes", "hair"))

stackoverflow

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v0.7.0

CC BY-SA 4.0

Authors

Neal Fultz <nfultz@gmail.com> and the StackOverflow.com community

Initial release

2020-01-03