How can I modify database in each iteration using the original one?

in my code T1 is a data base is already load,

N=10;
for i=1:N
   Qt(i).Cost = Evaluation(Qt(i).sequen,SI,D,T1,MST,NS,L);
end

i call the Evaluation function to evaluate each solution (vector) =Qt(i).sequen, Now T1 is the data base I wish to modify, but I want each Qt(i) modify by the original T1 not T1 already modified in the previous step

And the result of Qt save it in file .txt

How can i do that?

[KSSV]

To write output in the text file....read about fprintf. The other part is not clear.

[Mira le]

which part isn't clear?

[Walter Roberson]

You do not modify T1 in the code you show, so it is not clear why you are talking about T1 modified in the previous step.

[Mira le]

because my code is Iterative, so in each values of " i " ishall call the function "Evaluation" and the T1 have to be the original