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From: daniellauren on 2 Dec 2009 09:10
I wrote the following matlab code :


function [w] = SOR( A, b, x)
%UNTITLED Summary of this function goes here
% Detailed explanation goes here
error=1;

while error <= 10^-8;

w(1,1)=x(1,1)+1.6399/A(1,1)*(b(1,1)-A(1,1)*x(1,1)-A(1,2)*x(1,2)-A(1,3)*x(1,3));

for i=2:8;
w(1,i)=x(1,i)+1.6399/A(i,i)*(b(1,i)-A(i,i-1)*w(1,i-1)-A(i,i)*x(1,i)-A(i,i+1)*x(1,i+1));
end

w(1,9)=x(1,9)+1.6399/A(9,9)*(b(1,9)-A(9,8)*w(1,8)-A(9,9)*x(1,9));

z(1,i)=w(1,i)-x(1,i);

for j=1:9;
sum3=sum3+z(1,j)*z(1,j);
end

for j=1:9;
sum4=sum4+w(1,j)*w(1,j);
end

norma1=sqrt(sum3);
norma2=sqrt(sum4);
error=norma1/norma2;

for i=1:9;
x(1,i)=w(1,i);
end
end
end


When I ran the code I received no output...what's wrong??

Thanks
From: ImageAnalyst on 2 Dec 2009 20:35
Well, your output argument w is never assigned because the while loop
is never entered. You set error = 1 which is greater than 1e-8 so the
while loop never executes.

And I think you may have 1 too many ends. Try ending your function
with return instead of end - but actually you don't need either.
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