1 #!/usr/bin/python

     2 

     3 # finds the value of a polynomial in powers of z^{-1}

     4 # function Y = filtval(P,z)

     5 

     6 def fitval(P, z):

     7     N = len(P) - 1

     8     return Y

     9    

    10 Q = polyno(P,'x');

    11 Y = horner(Q,z)/z^N;