subarray(x, d, k) for picking all k-th elements of d-th dimension of x ?

[G..]

Very often I would need a function subarray(x, d, k) that picks, for integers
d and k, from an array x all k-th elements at dimension d:

y = subarray(x, d, k)   <=>   y = x(:,...,:,k,:,...,:)

where k is at position d.

Is there any such thing?

G.
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