Error using DynamicSystem/lsim

clc
% Define the matrices
A = [-1 2 ; 0 -3];
B = [1 ; 1];
C = [1 2];
D = 1;

% System TF
G = ss(A,B,C,D);

% Define the time vector
t = 0:0.1:10;

% Define u(t)
u = 1;

% Plot the response
figure;
lsim(G,u,t);
grid

This is my code and I'm getting the following error

Error using DynamicSystem/lsim

When simulating the response to a specific input signal, the input data U must be a matrix of numeric values with at least two rows (samples) and without

any NaN or Inf.

Answer 1

[Star Strider]

Instead of:

% Define u(t)

u = 1;

use:

% Define u(t)

u = ones(size(t,2),1);

Then, it works —

% clc
% Define the matrices
A = [-1 2 ; 0 -3];
B = [1 ; 1];
C = [1 2];
D = 1;

% System TF
G = ss(A,B,C,D)

G =
 
  A = 
       x1  x2
   x1  -1   2
   x2   0  -3
 
  B = 
       u1
   x1   1
   x2   1
 
  C = 
       x1  x2
   y1   1   2
 
  D = 
       u1
   y1   1
 
Continuous-time state-space model.

% Define the time vector
t = 0:0.1:10;

% Define u(t)
u = ones(size(t,2),1);

% Plot the response
figure;
lsim(G,u,t);
grid

.

[Sahithi Laxmi]

Thank you so much for your response!

[Star Strider]

As always, my pleasure!