Skip to main content
`Ctrl`+`K`

# numpy.ma.column_stack

ma.column_stack(tup)

  Stack 1-D arrays as columns into a 2-D array.

  Take a sequence of 1-D arrays and stack them as columns to make a single 2-D array. 2-D arrays are stacked as-is, just like with `hstack`. 1-D arrays are turned into 2-D columns first.

  Parameters:
    tup sequence of 1-D or 2-D arrays.

      Arrays to stack. All of them must have the same first dimension.

  Returns:
    stacked 2-D array

      The array formed by stacking the given arrays.

  See also

  `stack`, `hstack`, `vstack`, `concatenate`

  Notes

  The function is applied to both the `_data` and the `_mask`, if any.

  Examples

      >>> import numpy as np
      >>> a = np.array((1,2,3))
      >>> b = np.array((4,5,6))
      >>> np.column_stack((a,b))
      array([[1, 4],
             [2, 5],
             [3, 6]])