numpy.testing.assert_array_max_ulp

testing. assert_array_max_ulp ( a, b, maxulp=1, dtype=None ) [source]

Check that all items of arrays differ in at most N Units in the Last Place.

Parameters

a, b array_like

Input arrays to be compared.

maxulp int, optional

The maximum number of units in the last place that elements of a and b can differ. Default is 1.

dtype dtype, optional

Data-type to convert a and b to if given. Default is None.

Returns

ret ndarray

Array containing number of representable floating point numbers between items in a and b.

Raises

AssertionError

If one or more elements differ by more than maxulp.

See also

assert_array_almost_equal_nulp

Compare two arrays relatively to their spacing.

Notes

For computing the ULP difference, this API does not differentiate between various representations of NAN (ULP difference between 0x7fc00000 and 0xffc00000 is zero).

Examples

>>> a = np.linspace(0., 1., 100)
>>> res = np.testing.assert_array_max_ulp(a, np.arcsin(np.sin(a)))