Delay in for loop

Hi,

This is my code. executing a function and writing the values in an excel file.

After certain iterations 'n' it has to find the average of the values and that is how I planned.

But somewhere it went wrong and when I give 'n' as 2. i.e the no.of iteration for for loop be 2.

Instead of getting the result with in 5 or 7 seconds (when I do not calculate the average) The loop doesn't stop also it doesn't give any error msg.

When I close the Matlab window and open the written file there I get my answer written in the excel file.

What makes the for loop to take so long and what happens during that time.

Is there any way I can get the average of the values it.

Thanks

 for i=1:n

 tic; 

 [X,FVAL] = ga(@func1a,4,[],[],[],[],[-2 500 45 200],[2 1800 72 1600],[],optimset('TolX',1e-12));

 t=toc;

 if (i==1)
     y(i,:)=[[],[],X,t];
     cel = sprintf('A%i', i);
     w = {'GA','Trail.No','A','B','C','D','Time';[],i,X(1),X(2),X(3),X(4),t};
     xlswrite('d:\Office.xls',w,1,cel);
 else
     y(i,:)=[[],[],X,t];
     cel = sprintf('A%i', i+1);
     a={[],i,X(1),X(2),X(3),X(4),t};
     xlswrite('d:\Office.xls',a,1,cel);
  while i==n
     a=sum(y)/n;
     cel = sprintf('A%i', i+2);
     xlswrite('d:\Office.xls',a,1,cel);
  end
 end
end

Answer 1

[Walter Roberson]

In your loop you have

    while i==n
     a=sum(y)/n;
     cel = sprintf('A%i', i+2);
     xlswrite('d:\Office.xls',a,1,cel);
   end

but inside that loop you do not change "i" and you do not change "n" so if the loop condition is ever true it will remain true and you infinite loop.