[R] array to matrix or data.frame

Daniel Malter
Sun, 27 Sep 2009 22:33:22 -0000

Hi, I have an array of dimension 6:6:160000. I want to stack the 160000
slices of the array into a matrix or a data frame of dimension
6:(6*160000=960000) in order to write it to a csv file. It seems I cannot
get the matrix or data.frame functions to put the values from the array in
the same order as they appear in the array easily, but I am almost sure
there is an easy way to do this.

#Here is code for a small 6:6:2 array.

x=rep(rep(1:6,each=6),2)
dim(x)=c(6,6,2)

x

#Matrix approach 1:

matrix(x,nrow=12,ncol=6,byrow=F)

#Matrix approach 2:

matrix(x,nrow=12,ncol=6,byrow=T)

#Data frame approach (cbinds rather than rbinds):

data.frame(x)

None of the above works as I would like to. The "correct" approach
should
stack the same values all in the same column of the matrix or data frame. I
also could not get "stack" to work correctly and would appreciate your
help.

Daniel



--
View this message in context:
http://www.nabble.com/array-to-matrix-or-data.frame-tp25638310p25638310.html
Sent from the R help mailing list archive at Nabble.com.