comparison

Bases: BaseMetric

Legacy (AI2) metric used for original FV3 port.

This metric attempts to smooth error comparison around 0. It further tries to deal with close-to-0 breakdown of absolute error by allowing near_zero threshold to be specified by hand.

Bases: BaseMetric

Combination of absolute, relative & ULP comparison for floats

This metric attempts to combine well known comparison on floats to leverage a robust 32/64 bit float comparison on large accumulating floating errors.

ULP is used to clear noise (ULP<=1.0 passes) Absolute errors for large amplitude