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

[Ahmed Salah Hammad Ahmed]

Follow-up Comment #3, bug #65401 (group octave):

[comment #1 comment #1:]
> Can you please post your exact inputs so we can try to exactly recreate your
issue?


The first error message appears for this code (Sorry for the mess with how
matrix A looks..):

A = [0               1             0               0               0          
    0               0               0               0;
     -4*w0^2*sx   -Dx/Ix         Dx/Ix             0               0          
    0            w0*(1-sx)           0               0;
     0             Dx/Iwx       -Dx/Iwx            0               0          
    0               0               0               0;
     0               0             0               0               1          
    0               0               0               0;
     0               0             0          -3*w0^2*sy        -Dy/Iy        
  Dy/Iy             0               0               0;
     0               0             0               0             Dy/Iwy       
 -Dy/Iwy            0               0               0;
     0               0             0               0               0          
    0               0               1               0;
     0            -w0*(1-sz)       0               0               0          
    0           -w0^2*sz         -Dz/Iz         Dz/Iz;
     0               0             0               0               0          
    0               0             Dz/Iwz      -Dz/Iwz;
     ];
B = [0 0 0; 1/Ix 0 0; 0 0 0; 0 0 0; 0 1/Iy 0; 0 0 0; 0 0 0; 0 0 1/Iz; 0 0 0];
C = eye(9);
D = zeros(9, 3);
x0 = [0 0 0 0 0 0 0 0 0].'; % initial conditions
sys = ss(A, B, C, D);
t = 0:.2:50;
u = 1 * ones(3,length(t)); % input
% u = [zeros(1, 100) 1000, 0*ones(1, numel(t)-100-1)] .* [1; 1; 1];
[Y, X] = lsim(sys, u, t, x0);


Changing the time vector into:

t = (0:.2:5).*[1;1;1];


produces the second error message:

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




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