I coudn't really understand your question but your code is quite odd.
first you are defining iteration as a scalar. Then by writing
iteration(:,1)=u(:)
you are simply overwritting your initial value of 10, here you would have iteration as a vector of size 153x1 as per your u vector.
then when you are writing your for loop, you say
for i=1:iteration
end
this does not make sense. If your objective is to make 10 iteration you simply write
for i=1:10
end
and if the iteration is as per your u vector size then
for i=1:length(u)
end
as your code is written
at the ligne
iteration(:,i+1)=u(:)
is as you are saying iteration(:,2)=u(:) which is impossible since iteration is initially a vector of size 153x1
