Check for incorrect argument data type or missing argument in call to function 'lsim'.

Why doesn't matlab actually give you indicators to where the error is. Only doing it because of a class and have no intentions to actually learn it as I'll never use it in my career.

A = [-1.0889e-2 +2.8539e+1 -2.3779e+1 -3.2154e+1; -9.1949e-5 -7.9044e-1 +9.4864e-1 -1.6017e-3; +3.1611e-5 -6.3460e-1 -1.0254e+0 0; 0 0 1 0];
B = [+9.9851e+0 +1.6333e+1; -1.0219e-1 0; -1.1464e+1 0; 0 0];
C = eye(4);
D = zeros(4,2);
d2r = 2*pi;
%H1 = 20,000;
%Vcm1 = 700;
de = -0.1*ones(1001,1)*d2r;
dth = 0*ones(1001,1);
u =[de dth];
%Cchord = 11.32;
%Th = 1.9970;
t = linspace(0,10,1001).';
% gives error of unrecognized function or variable 'alp' alp=alpha

%x = [Vcm1, alp, q, Th];
%y = [Cx + du];
[y,x] = lsim(A,B,C,D,u,t);

Answer 1

[David Scidmore]

I figure it out by looking further into notes.

I downloaded an addon and used.

plot(t,x(:,1),'-k')