On Jan 18, 2013, at 1:02 PM, Rui Barradas wrote: > Hello, > > Try the following. > > complete.cases(f) & apply(f, 1, function(x) all(x == x[1])) > > > Hope this helps, > > Rui Barradas > > Em 18-01-2013 20:53, Sam Steingold escreveu: >> I have a data frame with several columns. >> I want to select the rows with no NAs (as with complete.cases) >> and all columns identical. >> E.g., for >> >> --8<---------------cut here---------------start------------->8--- >>> f <- data.frame(a=c(1,NA,NA,4),b=c(1,NA,3,40),c=c(1,NA,5,40)) >>> f >> a b c >> 1 1 1 1 >> 2 NA NA NA >> 3 NA 3 5 >> 4 4 40 40 >> --8<---------------cut here---------------end--------------->8---
> f[ which( rowSums(f==f[[1]]) == length(f) ), ] a b c 1 1 1 1 >> >> I want the vector TRUE,FALSE,FALSE,FALSE selecting just the first >> row because there all 3 columns are the same and none is NA. >> >> thanks! >> David Winsemius Alameda, CA, USA ______________________________________________ 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.
