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how to cut a multidimensional array along a chosen dimension and store each piece into a list
2 messages · Sean Zhang, Hadley Wickham
On Mon, Jan 17, 2011 at 2:20 PM, Sean Zhang <seanecon at gmail.com> wrote:
Dear R-Helpers,
I wonder whether there is a function which cuts a multiple dimensional array
along a chosen dimension and then store each piece (still an array of one
dimension less) into a list.
For example,
arr <- array(seq(1*2*3*4),dim=c(1,2,3,4)) ?# I made a point to set the
length of the first dimension be 1to test whether I worry about drop=F
option.
brkArrIntoListAlong <- function(arr,alongWhichDim){
####
return(outlist)
}
I have tried splitter_a in plyr package but does not get what I want.
library(plyr)
plyr:::splitter_a(arr,3)
We'll you're really not supposed to call internal functions - you probably want: alply(arr, 3) but you don't say what is wrong with the output. Hadley
Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/