implements pf1 .* b and a .* pf2
overload the .* operator, i.e. one can now write x .* pf in order to scale the PoleFigure pf by the factor x
implements pf1 .* b and a .* pf2
overload the .* operator, i.e. one can now write x .* pf in order to scale the PoleFigure pf by the factor x