How to put the values into adjacent matrix?

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Beibit Sautbek
Beibit Sautbek 2016-7-3
回答： Geoff Hayes 2016-7-3
I have matrix A=[2,2; 4,2; 3,4; 3,1]. The first column represents x axis, the second column represents y axis of the points. So I have 4 points. And I need make adjacent matrix of x elements of points. So, A=[x1,x2,x3,x4]=>A=[2,4,3,3]
How to make adjacent matrix like this?:

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Geoff Hayes
Geoff Hayes 2016-7-3
Beibit - it seems that the second column of your matrix A is ignored, so the code would just be
A=[2,2; 4,2; 3,4; 3,1];
adjMat = zeros(4,4);
for u=1:4
for v=1:4
adjMat(v,u) = A(u,1)-A(v,1);
end
end

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