mktheta

% -*- texinfo -*-
% @deftypefn {Function File} {} {mktheta (@var{a}, @var{b})}
%
% Create a theta structure from the IIR system @code{Ay = Bx}.  See  poly2th
% for details on the theta structure.
%
% @end deftypefn
% @seealso {poly2th, idsim}