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    %% Specify State and Input Names for Discrete-Time State-Space Model
%%
% Create state-space matrices and specify sample time.
A = [0 1;-5 -2];
B = [0;3];
C = [0 1];
D = 0;
Ts = 0.05;

%%
% Create state-space model, specifying the state and input names.
sys = ss(A,B,C,D,Ts,'StateName',{'Position' 'Velocity'},...
                    'InputName','Force');
                
%%
% The number of state and input names must be consistent with the
% dimensions of |A|, |B|, |C|, and |D|.