# cupy.vstack¶

cupy.vstack(tup)[source]

Stacks arrays vertically.

If an input array has one dimension, then the array is treated as a horizontal vector and stacked along the additional axis at the head. Otherwise, the array is stacked along the first axis.

Parameters: tup (sequence of arrays) – Arrays to be stacked. Each array is converted by cupy.atleast_2d() before stacking. Stacked array. cupy.ndarray