numpy.logical_or

numpy.logical_or(x1, x2, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj]) = <ufunc 'logical_or'>

Compute the truth value of x1 OR x2 element-wise.

Parameters

x1, x2array_like

Logical OR is applied to the elements of x1 and x2. If x1.shape != x2.shape, they must be broadcastable to a common shape (which becomes the shape of the output).

outndarray, None, or tuple of ndarray and None, optional

A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.

wherearray_like, optional

This condition is broadcast over the input. At locations where the condition is True, the out array will be set to the ufunc result. Elsewhere, the out array will retain its original value. Note that if an uninitialized out array is created via the default out=None, locations within it where the condition is False will remain uninitialized.

**kwargs

For other keyword-only arguments, see the ufunc docs.

Returns

yndarray or bool

Boolean result of the logical OR operation applied to the elements of x1 and x2; the shape is determined by broadcasting. This is a scalar if both x1 and x2 are scalars.

See also

logical_and, logical_not, logical_xor

bitwise_or

Examples

>>> np.logical_or(True, False)
True
>>> np.logical_or([True, False], [False, False])
array([ True, False])

>>> x = np.arange(5)
>>> np.logical_or(x < 1, x > 3)
array([ True, False, False, False,  True])

The | operator can be used as a shorthand for np.logical_or on boolean ndarrays.

>>> a = np.array([True, False])
>>> b = np.array([False, False])
>>> a | b
array([ True, False])

numpy.logical_and numpy.logical_not