[Octave-bug-tracker] [bug #65401] [octave forge] (control) A problem with lsim command

[Ahmed Salah Hammad Ahmed]

URL:
  <https://savannah.gnu.org/bugs/?65401>

                 Summary: [octave forge] (control) A problem with lsim command
                   Group: GNU Octave
               Submitter: asalahhammad
               Submitted: Sat 02 Mar 2024 02:55:43 PM UTC
                Category: Octave Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 7.1.0
         Discussion Lock: Any
        Operating System: GNU/Linux
           Fixed Release: None
         Planned Release: None


    _______________________________________________________

Follow-up Comments:


-------------------------------------------------------
Date: Sat 02 Mar 2024 02:55:43 PM UTC By: Ahmed Salah Hammad Ahmed
<asalahhammad>
I have a MIMO system, using state space representation I have 9 states, so A
is a 9x9 matrix, B is 9x3 matrix because I have 3 inputs..
If I set a time vector with n elements, going from 0 to T
The input signal u is 3xn matrix because as I said, I have 3 inputs

I just use the command:

sys = ss(A, B, C, D);
[Y, X] = lsim(sys, u, t, x0);


It says:

  length of time vector (n) doesn't match input signal (3xn)


This is an incompatibility with matlab, but anyway, I made the time vector
(3xn), and this error occurs which I don't understand:

  time vector 't' must be real-valued or empty


Note that the exact code at the beginning works perfectly on matlab








    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?65401>

_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/