On May 26, 2011, at 3:18 PM, Albert-Jan Roskam wrote: > Hi, > > I want to recode all Inf and NaN values to NA, but I;m surprised to see the > result of the following code. Could anybody enlighten me about this? > >> df <- data.frame(a=c(NA, NaN, Inf, 1:3)) >> df[is.infinite(df) | is.nan(df)] <- NA >> df > a > 1 NA > 2 NaN > 3 Inf > 4 1 > 5 2 > 6 3 >> > > > Thanks! > > Cheers!! > Albert-Jan
The canonical way is to use is.na() to assign the NA value based upon a condition. See ?is.na for more information. is.na(df$a) <- !is.finite(df$a) > df a 1 NA 2 NA 3 NA 4 1 5 2 6 3 HTH, Marc Schwartz ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
