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Performance in object-oriented matlab code

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from Performance in object-oriented matlab code by Dimitrios Korkinof
A very simple example to demonstrate an observation of mine regarding the use of classes in matlab.

C1 
classdef C1
    % Written by Dimitrios Korkinof
    % Imperial College London
    % http://www.korkinof.com
    
    properties
        large_mat;
        k;
    end
    
    methods
        function o = C1(N)
            o.large_mat = zeros(N,N);
        end
        function o = modify_one(o,i,j)
            o.large_mat(i,j) = rand(1,1); 
        end
    end
    
end

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