Validation And Metrics

API

• l1_error, l2_error, linf_error
• shape_metrics

Shape Verification

Beyond volume conservation, compare end-state shape with:

• l1_error, l2_error, linf_error against a reference field
• centroid drift via shape_metrics(vg).centroid
• second-moment drift via shape_metrics(vg).second_moments

Example:

s0 = shape_metrics(vg0)
s1 = shape_metrics(vg1)

centroid_err = norm(s1.centroid - s0.centroid)
moment_rel_err = norm(s1.second_moments - s0.second_moments) / norm(s0.second_moments)