DOLFIN

grad(f)(x) evaluation using evaluate_basis_derivatives

Asked by Chaffra Affouda

There's been a lot of discussion about evaluating grad(f) efficiently in dolfin (without using project). How would you do it in python using "evaluate_basis_derivatives"?

f = Function(Q)
e = Q.element()
e.evaluate_basis_derivatives(....) How do you use this?

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Chaffra Affouda (chaffra) said : 		#1

When using evaluate_basis_derivatives

RuntimeError: // Function evaluate_basis_derivatives not generated (compiled with -fno-evaluate_basis_derivatives)

Do I need to recompile ufc differently?

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Chaffra Affouda (chaffra) said : 		#2

This functionality will be implemented in dolfin