Function tests pass for order 1 at tolerance 1e-10
Function tests pass for order 1 derivatives at tolerance 1e-10
Interpolation tests pass for order 1 at tolerance 1e-10
Interpolation tests pass for order 1 derivatives at tolerance 1e-10
Interpolation tests FAIL for order 1 at tolerance 1e-10 error 0.144338
Interpolation tests FAIL for order 1 derivatives at tolerance 1e-10 error 1.41421