numpy.dstack — NumPy v1.15 Manual (original) (raw)
Stack arrays in sequence depth wise (along third axis).
This is equivalent to concatenation along the third axis after 2-D arrays of shape (M,N) have been reshaped to (M,N,1) and 1-D arrays of shape_(N,)_ have been reshaped to (1,N,1). Rebuilds arrays divided bydsplit.
This function makes most sense for arrays with up to 3 dimensions. For instance, for pixel-data with a height (first axis), width (second axis), and r/g/b channels (third axis). The functions concatenate, stack andblock provide more general stacking and concatenation operations.
| Parameters: | tup : sequence of arrays The arrays must have the same shape along all but the third axis. 1-D or 2-D arrays must have the same shape. |
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| Returns: | stacked : ndarray The array formed by stacking the given arrays, will be at least 3-D. |
See also
Join a sequence of arrays along a new axis.
Stack along first axis.
Stack along second axis.
Join a sequence of arrays along an existing axis.
Split array along third axis.
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]]])