c131.m

matlab例程MATLAB 6.x版的内建数据类型（Built-in data type）就有5种以上

num=[2 10]; den=[1 8 19 12];
[A,B,C,D]=tf2ss(num,den)
% In order to find the transfer function from A, B, C, and D, use
%[num, den]=ss2tf(A,B,C,D)
%printsys(num,den)