How get the Adjacency matrix from complete graph

Hi I need get the Adjacency matrix from this code

% Complete Graph
% N no Nudes
% E = edges

n = input('Give Number Nudes: ');

E = (n*(n-1)/2);


theta = linspace(0,2*pi,n+1).';
theta(end)=[]; % 0 = 2pi so...
r = n;
cor = [r*cos(theta) r*sin(theta)]; % x coordinates of points
axes('nextplot','add')
while size(cor,1) > 1
    cor_pt = repmat(cor(1,:),size(cor,1)-1,1); % point being connected to others
    cor(1,:) = [];
    for i = 1:size(cor_pt,1)
        line([cor_pt(i,1),cor(i,1)],[cor_pt(i,2),cor(i,2)],'marker','.','markersize',30)
    end
end

Answer 1

[Stephan]

Its trivial:

A = ones(n) - diag(diag(ones(n)))

or, more easy

A = ones(n) - eye(n)

[Konstantinos koutsikakis]

Thank you for your help