Fill an R array by filling lines first

Question

I would like to convert a vector into an array by filling first the lines of the array (instead of filling first the columns), would someone know a trick to do that? Thanks in advance!

I tried with these lines:

v=c(1,2,3,4,5,6)
M=array(data=v,dim=c(2,3))

But I get the following array:

> M
     [,1] [,2] [,3]
[1,]    1    3    5
[2,]    2    4    6

While I would like to get

> M
     [,1] [,2] [,3]
[1,]    1    2    3
[2,]    4    5    6

Answer 1

You can use matrix

> matrix(c(1,2,3,4,5,6), byrow = TRUE, nrow=2)
     [,1] [,2] [,3]
[1,]    1    2    3
[2,]    4    5    6

We can use array + aperm + transposing in dim=c(3,2)

> aperm(array(data=v,dim=c(3,2)), c(2,1))
     [,1] [,2] [,3]
[1,]    1    2    3
[2,]    4    5    6

Or simply follow @thelatemail's comment