Dear List, I ran into some trouble handling missing values.
Assume 2 vectors (numeric) including NAs a <- c(rep(seq(1,4),4),NA,NA) b <- c(sample(1:2,14,replace=T),NA,NA,1,2) I want to replace the values of vector a that are smaller than 2 and larger than 3 into NAs only in case vector b equals 1 a[b==1][a[b==1]<2 | a[b==1]>3] <- NA The following error accurse: NAs are not allowed in subscripted assignments So I tried to exclude NAs pat<-c((a[b==1]<2 & is.na(a[b==1])==F)| (a[b==1]>3 & is.na(a[b==1])==F)) this is a logical vector a[b==1][pat==T] <-NA But it did not help Even if I have a look at a[b==1][pat==T] [1] 1 4 4 1 All I want to do is change those values to NA. Is it possible that my mistake is caused by not understanding vector[logic operation a][logic operation b] I thought it is pretty much the same as x <- vector[logic operation a] x[logic operation b] I hope someone can help me Thanks ______________________________________________ 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.
