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function mymain
a=[1 2 3];

b=[4 5 6];
f=0.09;
x1=[]
y1=[]

[x1,y1]=qca(a,b,f)

function [x,y]=qca(a,b,f)

for i=1:3
x(i)=a(i)+b(i)+f;
y(i)=a(i)-b(i)-f;
end

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