R 3d array to 2d matrix

Question

Let's assume I have a 3d array of dimensions (x,y,z) and would like to restructure my data as a matrix of dimensions (x*y,z), something like:

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my_array <- array(1:600, dim=c(10,5,12))
my_matrix<-data.frame()

for (j in 1:5) {
  for (i in 1:10) {
     my_matrix <- rbind (my_matrix, my_array[i,j,1:12])
 }
}

Could you suggest a faster and more elegant way?

thanks

Answer 1

Change the dimension of the array:

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dim(my_array) <- c(10 * 5 , 12)