📄 createm.m
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function A=createM(x,y)
A=zeros((x+2)*(y+2),(x+2)*(y+2)+1);
for i=1:(x+2)*(y+2)
A(i,(x+2)*(y+2)+1)=1;
end
k=[];
l=0;
while l<x
k=[k,(x+4+l*(y+2)):(x+y+3+l*(y+2))];
l=l+1;
end
i=1;
while i<=x*y
A(k(i),k(i))=1;
A(k(i),k(i)+1)=1;
A(k(i),k(i)-1)=1;
A(k(i)+y+2,k(i))=1;
A(k(i)-y-2,k(i))=1;
i=i+1;
end
l=[k,((x+2)*(y+2)+1)];
A=A(k,l);
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