linalg:concatenate

(linalg:concatenate arrays &key axis)

Joins the arrays in the list arrays along an existing axis (numpy's np.concatenate, torch's cat). :axis defaults to 0 and a negative value counts from the end. Every input must have the same rank and the same extents on every axis but that one; the joined axis's extent is their sum. The result is a fresh array with the first input's element width. To join along a new axis instead, use linalg:stack.