You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: demo_excludeData.m
    path of file: ./repos/VBA-toolbox/demos/0_basics
    
    the code of the file until where you have to start completion: function demo_excludeData ()
% // VBA toolbox //////////////////////////////////////////////////////////
%
% [posterior, out] = demo_excludeData ()
% Demo of simulation and inversion of a dynamical system that is sampled on
% an irregular grid (not all timepoints are observed)
%
% More generally, this demo shows how to deal with data exclusion
%
% /////////////////////////////////////////////////////////////////////////

    
function demo_excludeData ()
% // VBA toolbox //////////////////////////////////////////////////////////
%
% [posterior, out] = demo_excludeData ()
% Demo of simulation and inversion of a dynamical system that is sampled on
% an irregular grid (not all timepoints are observed)
%
% More generally, this demo shows how to deal with data exclusion
%
% /////////////////////////////////////////////////////////////////////////

% number of simulated points
N = 257;

%% Specify the model
% =========================================================================
% For the sake of the demonstration, we use a simple linear dynamical
% system $ dx/dt = Ax + phi' u $ that is directly observed $ y = x + noise $

% evolution function
% -------------------------------------------------------------------------
options.inF.A = [- 4, - 16; 4, - 4];
options.inF.dt = 1e-1;

function fx = f_evolution(x,P,u,in)
    xdot = in.A * x + diag(P) * u;
    fx = x + in.dt * xdot;    
end