[R] Removing columns that are all NA from a matrix

[Gabor Csardi]

data <- data[ , !apply(is.na(data), 2, all)]

(or something like that)

G.

On Thu, Feb 14, 2008 at 12:59:46PM +0000, 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?
> 
> Thanks,
> 
> Martin
> 
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-- 
Csardi Gabor <csardi at rmki.kfki.hu>    UNIL DGM