Y may be any array. The axis specification is optional. If present, K must be an integer scalar or one-element vector. The value of K must be an axis of Y. If absent, the last axis is implied. The form R←⊖Y implies the first axis.
R is the array Y reversed on the Kth or implied axis.
⌽1 2 3 4 5 5 4 3 2 1 M 1 2 3 4 5 6 ⌽M 3 2 1 6 5 4 ⊖M 4 5 6 1 2 3 ⌽[1]M 4 5 6 1 2 3