Re: [R] setting elements to NA across an array

From: John Fox <jfox_at_mcmaster.ca>
Date: Thu 28 Jul 2005 - 03:37:25 EST


Dear Dr Carbon,

> -----Original Message-----
> From: r-help-bounces@stat.math.ethz.ch
> [mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Dr Carbon
> Sent: Wednesday, July 27, 2005 12:19 PM
> To: r-help@r-project.org
> Subject: [R] 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 foo[2,2,] <- NA and foo[3,5,] <- NA. How
> can I build a logical statement to do this?
>

That should work just as you've specified it: That is, elements in all "layers" in the second row, second column and in the the third row, fifth column of the array should be NA. Since you posed the question, I suppose that I'm missing something.

I hope this helps,
 John

> ______________________________________________
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Jul 28 03:40:17 2005

This archive was generated by hypermail 2.1.8 : Fri 03 Mar 2006 - 03:34:06 EST