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edac
2003 Aug 22
2
converting factor to numeric
...harder to remember, is
as.numeric(levels(f))[as.integer(f)]
In any case, do not call as.numeric() or their likes directly.
But trying to follow the advice:
(this is without package method attached, but the results are the
same with):
First doing as one shouldn't:
> table( as.numeric(EdadC) )
1 2 3 4 5
20 99 157 127 74
Doing as the FAQ says:
> table( as.numeric(as.character(EdadC)) )
character(0)
Warning message:
NAs introduced by coercion
or:
> table( as.numeric(levels(EdadC))[as.integer(EdadC)] )
character(0)
Warning message:
NAs introduced by coercion...