numpy.dstack

numpy.dstack(tup)

Stack arrays in sequence depth wise (along third axis).

Takes a sequence of arrays and stack them along the third axis to make a single array. Rebuilds arrays divided by dsplit. This is a simple way to stack 2D arrays (images) into a single 3D array for processing.

Parameters:

tup : sequence of arrays

Arrays to stack. All of them must have the same shape along all but the third axis.

Returns:

stacked : ndarray

The array formed by stacking the given arrays.

See also

vstack

Stack along first axis.

hstack

Stack along second axis.

concatenate

Join arrays.

dsplit

Split array along third axis.

Notes

Equivalent to np.concatenate(tup, axis=2).

Examples

>>> a = np.array((1,2,3))
>>> b = np.array((2,3,4))
>>> np.dstack((a,b))
array([[[1, 2],
        [2, 3],
        [3, 4]]])

>>> a = np.array([[1],[2],[3]])
>>> b = np.array([[2],[3],[4]])
>>> np.dstack((a,b))
array([[[1, 2]],
       [[2, 3]],
       [[3, 4]]])