numpy.broadcast_to

numpy.broadcast_to(array, shape, subok=False)[源代码]

Broadcast an array to a new shape.

Parameters:
array : array_like

The array to broadcast.

shape : tuple

The shape of the desired array.

subok : bool, optional

If True, then sub-classes will be passed-through, otherwise the returned array will be forced to be a base-class array (default).

Returns:
broadcast : array

A readonly view on the original array with the given shape. It is typically not contiguous. Furthermore, more than one element of a broadcasted array may refer to a single memory location.

Raises:
ValueError

If the array is not compatible with the new shape according to NumPy’s broadcasting rules.

Notes

1.10.0 新版功能.

Examples

>>> x = np.array([1, 2, 3])
>>> np.broadcast_to(x, (3, 3))
array([[1, 2, 3],
       [1, 2, 3],
       [1, 2, 3]])