plz explain what does this code do..?

[V, D] = eig(cov(M));
[z1 s1] = size(D);
for i=1:1:s1
    D1(i)=D(i,i);
end 
D2=max(D1(i));
for i=1:1:s1
    if D1(i)==D2;
        a1 = V(:,i)./sum(V(:,i));
    end
end
[z2 s2]=size(ca{1});

Answer 1

[KSSV]

[V, D] = eig(cov(M));  % Calculates the eigenvalues and eigenvectors of covariance of matrix M 
[z1 s1] = size(D);  % gets the size of diagonal eigenvalue matrix D 
for i=1:1:s1 
    D1(i)=D(i,i);   % this loop saves doagonal elements i.e. eigenvalues in D1/ 
end 
% The above can be achieved with D1 = diag(D) 
D2=max(D1(i));    % Assigns D1(s1) to D2, this is wrong..should be D2 = max(D1) 
for i=1:1:s1  % loop for each eigenvector/ eigenvalue 
    if D1(i)==D2;    % if D1 is equal to maxof D1
        a1 = V(:,i)./sum(V(:,i));   % normalize the eigen vectors 
    end
end
[z2 s2]=size(ca{1});

[praveen singathi]

thank you very much