Takes a vector, converts it to a factor, and reorders its levels
by their frequency of occurrence (most to least frequent by default).
Usage
factorSorted(x, decreasing = TRUE)
Arguments
- x
A vector (character or factor) to be reordered by level frequency.
- decreasing
Logical. If TRUE (default), levels are ordered from most
to least frequent; if FALSE, from least to most frequent.
Value
A factor with levels ordered by frequency.
Details
Frequencies are computed with table(x), which ignores NA values
by default. NA entries in x are preserved in the output but are
not considered a level.
Examples
factorSorted(c("a", "b", "a", "c", "b", "a"))
#> [1] a b a c b a
#> Levels: a b c
factorSorted(c("a", "b", "a", "c", "b", "a"), decreasing = FALSE)
#> [1] a b a c b a
#> Levels: c b a
factorSorted(factor(c("x", "y", "x", NA)))
#> [1] x y x <NA>
#> Levels: x y