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function [x1 k1]=gauss_seidel(A,b,e)
n=max(size(A));
for i=1:n
    if A(i,i)==0
          'eig can not be zero'
        return
    end
end
k=0;
kend=50;
r=1;
x=zeros(n,1);
while k<=kend && r>e
    x0=x;
    for i=1:n
        s=0;
        for j=1:i-1
            s=s+A(i,j)*x(j);
        end
        for j=i+1:n
            s=s+A(i,j)*x0(j);
        end
        x(i)=b(i)/A(i,i)-s/A(i,i);
    end
    r=norm(x-x0,inf);
    k=k+1;
end
if k>kend
    'die dai bu shou lian ,failure'
    return
else
    'qiu jie cheng gong'
end
x1=x;
k1=k;


ÕâÊÇÎÒÒªÇóµÄÎÊÌ⣺
e=0.000000001;
for n=4:12
    A=hilb(n);
    b=A(:,1);
    [x k]=gauss_seidel(A,b,e)
end

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Error in gauss_seidel (line 2)
n=max(size(A));

Output argument "x1" (and maybe others) not assigned during call to "gauss_seidel".


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if k>kend
    'die dai bu shou lian ,failure'
    return
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2Â¥2015-10-24 12:55:08
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3Â¥: Originally posted by lvweizhong at 2015-10-24 14:52:09
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2Â¥: Originally posted by mygt_hit at 2015-10-24 12:55:08
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if k>kend
    'die dai bu shou lian ,failure'
    return

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гæ (³õÈëÎÄ̳)

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5Â¥: Originally posted by lvweizhong at 2015-10-25 16:01:59
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mygt_hit

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6Â¥: Originally posted by ²©Ñ§GG at 2015-10-25 16:08:13
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