numpy.vstack¶
-
numpy.
vstack
(tup)[source]¶ Stack arrays in sequence vertically (row wise).
Take a sequence of arrays and stack them vertically to make a single array. Rebuild arrays divided by
vsplit
.This function continues to be supported for backward compatibility, but you should prefer
np.concatenate
ornp.stack
. Thenp.stack
function was added in NumPy 1.10.Parameters: tup : sequence of ndarrays
Tuple containing arrays to be stacked. The arrays must have the same shape along all but the first axis.
Returns: stacked : ndarray
The array formed by stacking the given arrays.
See also
stack
- Join a sequence of arrays along a new axis.
hstack
- Stack arrays in sequence horizontally (column wise).
dstack
- Stack arrays in sequence depth wise (along third dimension).
concatenate
- Join a sequence of arrays along an existing axis.
vsplit
- Split array into a list of multiple sub-arrays vertically.
block
- Assemble arrays from blocks.
Notes
Equivalent to
np.concatenate(tup, axis=0)
if tup contains arrays that are at least 2-dimensional.Examples
>>> a = np.array([1, 2, 3]) >>> b = np.array([2, 3, 4]) >>> np.vstack((a,b)) array([[1, 2, 3], [2, 3, 4]])
>>> a = np.array([[1], [2], [3]]) >>> b = np.array([[2], [3], [4]]) >>> np.vstack((a,b)) array([[1], [2], [3], [2], [3], [4]])