ref_level | R Documentation |
Extracts the reference or a specific level the supplied factor, returning it as a factor with the same levels as the one supplied.
ref_level(fct)
level(fct, level)
fct |
factor; the factor from which the reference or specific level will be extracted. |
level |
character; the specific level to extract in the case of
|
A length 1 factor with the same levels as the supplied factor fct
.
f <- factor(sample(letters[1:5], 100, replace = TRUE))
# the reference level
ref_level(f)
# a specific level
level(f, level = "b")
# note that the levels will always match the input factor
identical(levels(f), levels(ref_level(f)))
identical(levels(f), levels(level(f, "c")))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.