Stacks 1-D and 2-D arrays as columns into a 2-D array.
A 1-D array is first converted to a 2-D column array. Then, the 2-D arrays are concatenated along the second axis.
Parameters: tup (sequence of arrays) – 1-D or 2-D arrays to be stacked. Returns: A new 2-D array of stacked columns. Return type: cupy.ndarray