Re: [R] apply mean to a three-dimension data

Hi, I think you could also use this way (via array, see http://r.789695.n4.nabble.com/apply-over-list-of-data-frames-td3057968.html) b <- list() b[[1]] = matrix(1:4, 2, 2) b[[2]] = matrix(10:13, 2, 2) b[[3]] = matrix(20:23, 2, 2) b.a <- array(unlist(b), dim=c(2, 2, 3)) (b.mean <- apply(X = b.

Re: [R] apply mean to a three-dimension data

Hi Hui, Ssee ?Reduce for more details. You might try something along the lines of > mymean <- function(x) Reduce("+", x)/length(x) > add(b) [,1] [,2] [1,] 10.3 12.3 [2,] 11.3 13.3 HTH, Jorge On Thu, Mar 24, 2011 at 11:07 AM, Hui Du <> wrote: > Hi All, > >

Re: [R] apply mean to a three-dimension data

Sorry, the above should have been > mymean <- function(x) Reduce("+", x)/length(x) > mymean(b) [,1] [,2] [1,] 10.3 12.3 [2,] 11.3 13.3 Apologies for the noise. Best, Jorge On Thu, Mar 24, 2011 at 3:54 PM, Jorge Ivan Velez <> wrote: > Hi Hui, > > Ssee ?Reduce for m

Re: [R] apply mean to a three-dimension data

Are you taking the same online course as Barth Riley, who posed a very similar question only this morning? On Mar 24, 2011, at 11:07 AM, Hui Du wrote: Hi All, Suppose I have data like b[[1]] = matrix(1:4, 2, 2) b[[2]] = matrix(10:13, 2, 2) b[[3]] = matrix(20:23, 2, 2) [[1]]

[R] apply mean to a three-dimension data

Hi All, Suppose I have data like [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide

[R] apply mean to a three-dimension data

Hi All, Suppose I have data like b[[1]] = matrix(1:4, 2, 2) b[[2]] = matrix(10:13, 2, 2) b[[3]] = matrix(20:23, 2, 2) [[1]] [,1] [,2] [1,]13 [2,]24 [[2]] [,1] [,2] [1,] 10 12 [2,] 11 13 [[3]] [,1] [,2] [1,] 20 22 [2,] 21 23