I have an adjacency matrix .Now I want to rewire by replacing two edges at random.I have tried please see below

clc;

clear all;

n = 10;

C= zeros(n, n);

C(1,n)=1;

C(1,n-1)=1;

C(2,n)=1;

A = zeros(n, n);

for i = 1:n

for j = 1:n

if j==i+1 || j == i + 2

A(i,j) = 1;

else

A(i, j) = 0;

end

end

end

B1=A+C;

B=B1+B1';

##

umEdgesToRewire =2;

matrixSize=10;

edgesToRewire = randperm(matrixSize, numEdgesToRewire);

for i = 1:numEdgesToRewire

node1 = edgesToRewire(i);

node2 = randi([1, matrixSize]);

while node2 == node1 || B(node1, node2) == 1

node2 = randi([1, matrixSize]);

end

B(node1, node2) = 1;

B(node2, node1) = 1;

end