Returns an interpolatory state-space model based on the transfer function
method . This method is general and is, effectively, a wrapper of the
system size increases with interpolatory order, but can be optimised for fast on-line evaluation
- param SS_list:
List of state-space models instances of
- type SS_list:
- param wv:
list of interpolatory weights.
- type wv:
For fast online evaluation, this routine can be optimised to return a class that handles each state-space model independently. See ref.  for more details.
 Benner, P., Gugercin, S. & Willcox, K., 2015. A Survey of Projection-Based Model Reduction Methods for Parametric Dynamical Systems. SIAM Review, 57(4), pp.483–531.