use the loop index list to fix a variable

GAMS
1

Hello every one
I want to use the loop index list to fix an element of a variable. I used this code:

loop(i,
attack.fx(i)=0;
solve T maximizing o using mip;
);

but the output is not exactly what I need. in every loop, it fixes some elements of attack variable up to i value. It means, in the last run of the solve command, all elements of attack are fixed! can anyone help me, please?

2

Hi Shaparak,

Not sure what you want to achieve, but you might want to free the attack variable again after the solve, that way the variable only is fixed for the index i it is currently looping over.

Regards,
GFA

loop(i,
attack.fx(i)=0;
solve T maximizing o using mip;
attack.lo(i) = -inf;
attack.up(i) = inf;
);
3

[/quote]

Thank you a lot! it works