mattbju2013 wrote > Hi guys this is my first post, i need help summing the number of NA's in a > few vectors > > for example.. > > c1<-c(1,2,NA,3,4) > c2<-c(NA,1,2,3,4) > c3<-c(NA,1,2,3,4) > > how would i get a result that only sums the number of NA's in the vector? > the.result.i.want<-c(2,0,1,0,0)
See ?is.na . Now, if I can interpret your question correctly, you're actually looking for the number of NA per *position* in the vectors, so let's make them into a matrix first. cmat<-rbind(c1,c2,c3) then use apply over columns apply(cmat,2,function(k)sum(is.na(k))) -- View this message in context: http://r.789695.n4.nabble.com/How-would-i-sum-the-number-of-NA-s-in-multiple-vectors-tp4678411p4678432.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
