New question #146882 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/146882
Hi all,
This should be a naive question since I am about 14 days new to Dolfin at
this point.
I want to calculate gradients for either a scalar or a vector field. Both
scalar or vector fields are read from external files. The mesh below refers to
a triangulated surface.
V = FunctionSpace(mesh, "CG", 1)
scalar1 = Function(V, "1.xml")
c = grad(scalar1)
I want to have c as a vector so that I can save that to a vtk file for
visualization or do some further operations on that.
outfile = File("example.pvd")
outfile << c
Alternatively, I could convert c to 3 different scalar functions. Is there
anyway to do such operation in Dolfin.
For a vector field v(x,y,z), the gradient operation will create a
tensor/matrix. How can I manipulate them? For instance, I only need dv/dx,
dv/dy and dv/dz. Thanks so much for your help.
Best regards,
--JJ
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