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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.

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lsim( SS, [2;0.2], t)
this is the code ss is a state space model with 2 inputs and t is 0:0.4:10

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Ameer Hamza
Ameer Hamza el 11 de Jun. de 2020
'u' must have as many rows as the number of elements in 't'. It seems that you want to apply step inputs. Try something like this
t = 0:0.4:10;
u = repmat([2, 0.2], numel(t), 1);
lsim(SS, u, t);
  3 comentarios
Ameer Hamza
Ameer Hamza el 12 de Jun. de 2020
You need to specify it as two columns. The number of rows should be the same as the number of elements in t. u is like this
u = [
2 0.2;
2 0.2;
..
..
2 0.2]; % rows same as numel(t)
khaled elmoshrefy
khaled elmoshrefy el 13 de Jun. de 2020
Editada: khaled elmoshrefy el 13 de Jun. de 2020
Yeah i searched for these functions on mathworks. It goes like you said ,thanks

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