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- clear
- A=load('A.txt');
- b=load('b.txt');
- n=size(A,1);
- x=zeros(n,1);
- if size(A)==size(A')
- for i=1:n
- for j=(i+1):n
- if A(i,j)~=0
- disp('stop')
- return
- end
- end
- end
- if det(A)==0
- disp('hey')
- return
- end
- if n~=size(b,1)
- return
- end
- x(1)=b(1)/A(1,1);
- for i=2:n
- sum=0;
- x(i)=(1/A(i,i));
- for j=1:(i-1)
- sum=sum+A(i,j)*x(j);
- end
- x(i)=x(i)*(b(i)-sum);
- end
- end
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