ss function is undefined.

21 次查看（过去 30 天）
Matthew Buschur
Matthew Buschur 2016-6-14
评论： Star Strider 2020-11-8
Hello,
I am trying to use the state space function, "ss" to solve four matrices. However, when I type my code in a new script file I get the following error:
*Undefined function or variable 'ss'.
Error in Homework5 (line 10) sys = ss(A,B,C,D);*
My code is shown below:
% A = [0 0 -(7/2); 1 0 -2; 0 1 -(5/2)];
B = [0; 0; (1/2)];
C = [1 0 0; 0 0 1];
D = [0; 0];
sys = ss(A,B,C,D);
step(sys)

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2016-6-14
That's in the Signal Processing Toolbox. Do you see that listed when you issue the "ver" command?
  2 个评论
Matthew Buschur
Matthew Buschur 2016-6-14
Yep that is the problem, I was thinking it might be a dependency issue. I couldn't remember if I slimmed the install down when I installed Matlab or not, but obviously I did.
Can one of you two direct me to the easiest way to install those two packages to my current install?
Matthew Buschur
Matthew Buschur 2016-6-14
Actually never mind. I got it. Thank you both!!!

请先登录，再进行评论。

更多回答（2 个）

Star Strider
Star Strider 2016-6-14
You have to have the Control System Toolbox or the Signal Processing Toolbox (or both, at best) installed to use the ‘ss’ function.
Type:
ver
in the Command Window to see if you have one or both of them.
Faisal Budikasih
Faisal Budikasih 2020-11-8
编辑：Faisal Budikasih 2020-11-8
i guess the right toolbox for the function ss is control system toolbox .

类别

在 Help Center 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by