Projection of values

[dokken]

@Bas

If I project it to DG0, It will have solutions at the centroids if I am correct. How can I find the solutions for the projected space ?

What do you mean by solutions, do you mean an array of the data and corresponding coordinates?
If so use dolfin.Function.vector().get_local() and dolfin.FunctionSpace.tabulate_dof_coordinates()`

@Bas

if I have a vector solution from an external software as an array at centroids or nodes, is it possible to use that to make something like a vectorfunctionspace and export it to pvd for visualization ?

See Assign values to the node in vectorFunctionSpace - #2 by dokken