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
