jax.numpy.isclose(a, b, rtol=1e-05, atol=1e-08, equal_nan=False)[source]

Returns a boolean array where two arrays are element-wise equal within a

LAX-backend implementation of isclose().

Original docstring below.


The tolerance values are positive, typically very small numbers. The relative difference (rtol * abs(b)) and the absolute difference atol are added together to compare against the absolute difference between a and b.


The default atol is not appropriate for comparing numbers that are much smaller than one (see Notes).

  • a (array_like) – Input arrays to compare.

  • b (array_like) – Input arrays to compare.

  • rtol (float) – The relative tolerance parameter (see Notes).

  • atol (float) – The absolute tolerance parameter (see Notes).

  • equal_nan (bool) – Whether to compare NaN’s as equal. If True, NaN’s in a will be considered equal to NaN’s in b in the output array.


y – Returns a boolean array of where a and b are equal within the given tolerance. If both a and b are scalars, returns a single boolean value.

Return type