Method split

python/dolfinx/fem/function.py:603–616

Extract (any) sub-functions. A sub-function can be extracted from a discrete function that is in a mixed, vector, or tensor FunctionSpace. The sub-function resides in the subspace of the mixed space. Returns: First level of subspaces of the function spac

(self)

        return Function(self._V.sub(i), self.x, name=f"{self!s}_{i}")

    def split(self) -> tuple[Function[Scalar], ...]:
        """Extract (any) sub-functions.

        A sub-function can be extracted from a discrete function that is
        in a mixed, vector, or tensor FunctionSpace. The sub-function
        resides in the subspace of the mixed space.

        Returns:
            First level of subspaces of the function space.
        """
        num_sub_spaces = self.function_space.num_sub_spaces
        if num_sub_spaces == 1:
            raise RuntimeError("No subfunctions to extract")
        return tuple(self.sub(i) for i in range(num_sub_spaces))

    def collapse(self) -> Function[Scalar]:
        """Create a collapsed version of this Function."""