Combining matrices into an array in R

Question

If I have several matrices that I have created, how can I combine them into one array? I have 8 matrices that each have 200 rows and 200 columns and I need to combine them into an array with dim = 200,200,8. So I want each of my matrices to be a slice of my array.

Answer 1

You can use the abind function from the abind package:

library(abind)
newarray <- abind( mat1, mat2, mat3, mat4, along=3 )

## or if mats are in a list (a good idea)

newarray <- abind( matlist, along=3 )