hope this helps. spencer graves
David Andel wrote:
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
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