[R] Replacing all NA values in a matrix
Whit Armstrong
Whit.Armstrong at tudor.com
Wed Jan 5 15:45:41 CET 2005
x <- matrix(rnorm(100),ncol=10)
x[x>0] <- NA
x[is.na(x)] <- 1000
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of
> michael watson (IAH-C)
> Sent: Wednesday, January 05, 2005 9:26 AM
> To: R-help at stat.math.ethz.ch
> Subject: [R] Replacing all NA values in a matrix
>
>
> OK, dumb question, and it is probably in the docs somewhere,
> but after 12 months working with R and quite a while looking
> at the docs, I still don't know (or have forgotten) how to
> replace all NA values in a matrix at once with some other
> value. I can do it column by column using is.na(), but I
> can't figure out how to do it for the whole matrix. My
> apologies, I am ashamed ;-)
>
> Michael Watson
> Head of Informatics
> Institute for Animal Health,
> Compton Laboratory,
> Compton,
> Newbury,
> Berkshire RG20 7NN
> UK
>
> Phone : +44 (0)1635 578411 ext. 2535
> Mobile: +44 (0)7990 827831
> E-mail: michael.watson at bbsrc.ac.uk
>
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