jax.numpy.isinf¶

jax.numpy.isinf(x)[source]¶

Test element-wise for positive or negative infinity.

LAX-backend implementation of isinf(). Original docstring below.

isinf(x, /, out=None, *, where=True, casting=’same_kind’, order=’K’, dtype=None, subok=True[, signature, extobj])

Returns a boolean array of the same shape as x, True where x == +/-inf, otherwise False.

Parameters

x (array_like) – Input values

Returns

y – True where x is positive or negative infinity, false otherwise. This is a scalar if x is a scalar.

Return type

bool (scalar) or boolean ndarray

See also

isneginf(), isposinf(), isnan(), isfinite()

Notes

NumPy uses the IEEE Standard for Binary Floating-Point for Arithmetic (IEEE 754).

Errors result if the second argument is supplied when the first argument is a scalar, or if the first and second arguments have different shapes.

Examples

>>> np.isinf(np.inf)
True
>>> np.isinf(np.nan)
False
>>> np.isinf(np.NINF)
True
>>> np.isinf([np.inf, -np.inf, 1.0, np.nan])
array([ True,  True, False, False])

>>> x = np.array([-np.inf, 0., np.inf])
>>> y = np.array([2, 2, 2])
>>> np.isinf(x, y)
array([1, 0, 1])
>>> y
array([1, 0, 1])