Equal arrays

The assert_array_equal function raises an exception if two arrays are not equal. The shapes of the arrays have to be equal and the elements of each array must be equal. NaNs are allowed in the arrays. Alternatively, arrays can be compared with the array_allclose function. This function has the parameters atol (absolute tolerance) and rtol (relative tolerance). For two arrays a and b, these parameters satisfy the equation:

|a - b| <= (atol + rtol * |b|)