求助各位大师，很着急！我想用matlab的系统辨识功能来求传递函数，程序如下：U=[0 0.84 0.14 -0.96 -0.28 0.93 0.99 0.41];Z=[0 0.195 0.513 -0.272 -0.42 0.058 0.263 0.45];m=iddata(Z,U);V=arx(m,[1 1 1]);present(V);运行以后报错是这样的：??? Error using ==> arxError using ==> arxdecodThe order matrix NN must have the same number of rows as there are outputs.Error in ==> cj at 4V=arx(m,[1 1 1]);我不太懂matlab，不明白程序有什么错误。这是很急想用它估计一个传函，希望大家能帮帮忙啊！实在是感谢！
