Factor matrix

Factor matrix — the retained basis vectors for one mode. Spanish: matriz de factores.

One per axis. For the taxi tensor (4, 5, 24) — 4 pickup boroughs × 5 dropoff boroughs × 24 hours, 480 counts — kept at multilinear rank (2, 2, 3), the hour factor matrix is (24, 3): one row per real hour, one column per learned direction.

That shape is worth staring at. The rows are the original axis, untouched. The columns are what the decomposition found.