Compared to base R, this function creates levels in the order in which they appear, which will be the same on every platform. (Base R sorts in the current locale which can vary from place to place.)
as_factor(x, ...) # S3 method for factor as_factor(x, ...) # S3 method for character as_factor(x, ...)
Object to coerce to a factor.
Other arguments passed down to method.
This is a generic function.
x <- c("a", "z", "g") as_factor(x)#>  a z g #> Levels: a z gas.factor(x)#>  a z g #> Levels: a g z