Sorry, I hit the send botton by accident. Here is my code so far: dat<-read.csv('myfile.csv', na.strings="") dat[is.na(dat]<-'N'
But it doesn't replace the <NA> for the letter 'N'. I am using R v 2/7/0, running it under Windows XP. Thank you, Judith ____________________________________________________________________________________ Be a better friend, newshound, and ______________________________________________ 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.