F# how to append/join array2D and combine 1D arrays to array2D

Question

in F#, array.append can join two arrays; is there a way to append 2 array2D objects into one or column-wise join several 1-D arrays into one array2D object?

Answer 1

The array2D function will turn any seq<#seq<'T>> into a 'T [,] so it should work for turning a bunch of 1D arrays into a 2D array.

let arr1 = [| 1; 2; 3 |]
let arr2 = [| 4; 5; 6 |]

let combined = array2D [| arr1; arr2 |]