It depends a bit on what function you are using. For example, set.seed(1) xx <- c(NA, rnorm(10)) > mean(xx) [1] NA > mean(xx, na.rm=TRUE) [1] 0.1322028
Is how you would use this to compute a mean. Harold > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Thomas Preuth > Sent: Thursday, September 21, 2006 1:59 PM > To: r-help@stat.math.ethz.ch > Subject: [R] how to ignore "NA" or replace it by another value > > Hello, > > I`m a newbie to R so maybe this question is boring, but I > have a large table with several empty missing values, which > come out as "NA". How can i ignore them or replace them by > another number? > > Greetings, Thomas > > ______________________________________________ > R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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.