(self, coord_index)
return BaseVectorField(self, coord_index)
Return a basis vector field.

        The basis vector field for this coordinate system. It is also an
        operator on scalar fields.

        See the docstring of ``CoordSystem`` for examples.
Return a basis vector field.
Return a basis vector field .
def base_vector(self, coord_index):
        """Return a basis vector field.

        The basis vector field for this coordinate system. It is also an
        operator on scalar fields.

        See the docstring of ``CoordSystem`` for examples."""
        return BaseVectorField(self, coord_index)
def base_vector ( self , coord_index ) : return BaseVectorField ( self , coord_index )