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2005 Jul 27
2
setting elements to NA across an array
Please excuse what is obviously a trivial matter...
I have a large 3-d array. I wish to set the third dimension (z) to NA
if there are any NA values in the first two dimnesions (xy). So, given
array foo:
foo <- array(data = NA, dim = c(5,5,3))
foo[,,1] <- matrix(rnorm(25), 5, 5)
foo[,,2] <- matrix(rnorm(25), 5, 5)
foo[,,3] <- matrix(rnorm(25), 5, 5)
I'll set two elements to NA
foo[2,2,1]<- NA
foo[3,5,2]<- NA
foo
Now I want to set fo...