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Factor Codes
Syntax
codes(x)
codes(x) <- y
Value
This 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(3,5,15)
codes(x)[3] <- 2
all(unique(codes(x)) == 1:nlevels(x))#- should be true for ALL factors