Removing columns that are all NA from a matrix
On 2/14/2008 7:59 AM, Martin Waller wrote:
Hi, I guess this might be a FAQ or something, and there's probably a nice simple way to do it, but I can't think of it: Given a matrix, I want to remove columns that are _entirely_ filled with NAs (partial NAs are fine). How please?
mymat[,which(colMeans(is.na(mymat)) < 1)]
Thanks, Martin
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