Factor Codes
Usage
codes(x)
codes(x) <- value
Value
This (generic) function retrieves the underlying
integer codes used for the levels of a factor
and can also be used to reset (a subset of) these codes.See Also
factor
, levels
, nlevels
.Examples
x <- gl(3,5)
codes(x)[3] <- 2
all(unique(codes(x)) == 1:nlevels(x))#- should be true for ALL factors