Question #105494 on DOLFIN changed: https://answers.launchpad.net/dolfin/+question/105494
Johan Hake posted a new comment: Hi again! Sorry for the incomplete answer. In dolfin 0.9.4 I think you have to pass the Function space using the keyword argument V=V when you instantiate your Expression. randf1 = myrand(V=V) It's actually there in the error message ;) In later dolfin version you only need to instantiate your Expression using randf1 = myrand() Johan On Thursday March 25 2010 08:33:48 Achim Schroll wrote: > Question #105494 on DOLFIN changed: > https://answers.launchpad.net/dolfin/+question/105494 > > Status: Answered => Open > > Achim Schroll is still having a problem: > Hi Johan, I don't get it. Expression gives the error... > > class myrand(Expression): > def eval(self, values, x): > values[0] = gauss(0,1) > > mesh = UnitSquare(20, 20) > V = FunctionSpace(mesh, "CG", 1) > > randf1 = myrand(V) > > Traceback (most recent call last): > File "addnoise_ny.py", line 37, in <module> > randf1 = myrand(V) > File "/usr/lib/python2.5/site-packages/dolfin/expression.py", line 120, > in __init__ raise TypeError, "Expression need to be initialized using > either a 'cpp.FunctionSpace', using kwarg 'V', or an 'ufl.FiniteElement' > using kwarg 'element'." TypeError: Expression need to be initialized using > either a 'cpp.FunctionSpace', using kwarg 'V', or an 'ufl.FiniteElement' > using kwarg 'element'. -- You received this question notification because you are a member of DOLFIN Team, which is an answer contact for DOLFIN. _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : [email protected] Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
