Hola! The R FAQ says:
7.12 How do I convert factors to numeric? It may happen that when reading numeric data into R (usually, when reading in a file), they come in as factors. If f is such a factor object, you can use as.numeric(as.character(f)) to get the numbers back. More efficient, but 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 ? Kjetil Halvorsen ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
