Hi there, Is there an equivalent to function.assign() method in dolfinx? Would something along the lines of receiver_function=function_to_be_assigned.copy() do the trick? Many thanks

See for instance: [image] Copying a function in dolfinx dolfinx For now you can make a workaround as follows: func = Function(V) copy = Function(V) copy.x.array[:] = func.x.array There is an issue registered on github, and a proposed fix is added in: Fix function copy o…

Thank you! What if the assignment holds only for a subfunction as below in dolfin? assign(V1function, V2function.sub(0)) I have tried the below which returned ‘NotImplementedError: Cannot take length of non-vector expression.’ space_0, map_0 = V2function.sub(0).collapse() V1function.x.ar…

I dont follow. Please make a minimal code example that produces this error message. It is not clear what V1function and V2function is.

Sorry for the confusion. I was manipulating a function that defined three fields (V2function), of which I wanted to assign only one to another function (V1function). I solved it using: V1function.x.array[:] = V2function.sub(0).collapse().x.array Many thanks

Function.assign in Dolfinx

dolfinx

dokken April 5, 2022, 1:22pm 2

See for instance:

Save scalar components as vector

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Function.assign in Dolfinx

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