Re: [R] apply and arrays

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Mon 25 Jul 2005 - 16:52:39 EST

Laura Holt wrote:

> Hi R!
>
> I have a 3 dimensional array, which is 21 x 3 x 3
>
> I want to use apply to sum on each 21x3 matrix, which is fine.
>
> Is there a way that I can do this in 1 step instead of a loop (3), please?

Don't know which direction you mean, I guess one of the following:

apply(x, c(1,2), sum)
apply(x, 3, sum)

Uwe Ligges

> thanks,
> Laura Holt
> mailto: holtlaura@gmail.com
>
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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 Mon Jul 25 16:55:23 2005

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