> which(is.na(x)) [1] 2 > which(!x) [1] 3 HTH, Jerome
On July 14, 2003 09:31 am, David Andel wrote: > Content-Length: 572 > Status: R > X-Status: N > > I need to know the position of the NA's in a matrix but it is resisting > my approaches. > > The problem shows already with a simple vector: > > x <- c(TRUE,NA,FALSE,TRUE) > > x > > [1] TRUE NA FALSE TRUE > > > which(x) > > [1] 1 4 > > > x[x==T] > > [1] TRUE NA TRUE > > > x[x==NA] > > [1] NA NA NA NA > > > x[x=="NA"] > > [1] NA > > > x[x==F] > > [1] NA FALSE > > How can I get just the position (2) for NA and (3) for FALSE as I do > with "which(x)" for TRUE? > > Thanks, > David > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
