Hello, Try
# for columns a.b it's 1:2, not 1:3 data[data[,4] == 0, 1:3] <- NA # columns a, b and c Hope this helps, Rui Barradas Em 02-03-2013 10:26, Camilo Mora escreveu:
Hi everyone, Imagine that I have a data frame with four columns: data<- a b c d 0 1 1 0 1 1 1 1 1 0 0 1 I want to replace the zeros in columns a:b for NA only for the rows in which column d are zero. So a b c d NA 1 1 0 1 1 1 1 1 0 0 1 I am trying this: data[,1:3][data[4] == 0] <- NA But get this error: Error in `[<-.data.frame`(`*tmp*`, Data[4] == 0, value = NA) : only logical matrix subscripts are allowed in replacement Does anyone knows the reason of this error or is there an alternative to replace the values in one column based on the values of another? Thanks, Camilo Camilo Mora, Ph.D. Department of Geography, University of Hawaii http://www.soc.hawaii.edu/mora/ ______________________________________________ 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.
______________________________________________ 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.
