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    %% Unconstrained Pattern Search Minimization  
% Minimize an unconstrained problem using the |patternsearch| solver.   

%% 
% Create the following two-variable objective function. On your MATLAB(R)
% path, save the following code to a file named |psobj.m|. 
%
% <include>psobj.m</include>
%
%% 
% Set the objective function to |@psobj|. 
fun = @psobj;  

%% 
% Find the minimum, starting at the point |[0,0]|. 
x0 = [0,0];
x = patternsearch(fun,x0)