if and then command

Hello everyone,

I want to add a command in which if variable " f(i,j) " is lower than an amount, then it is omitted from the next equation .something like an “if and then command” .for example :

if f(i,j)=L=5, then put f(i,j)=e=0 .

(lets say f(‘1’,‘1’)=2 then we should have f(‘1’,‘1’)=e=0 for the next calculations.) .


thank you very much


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Dear Dehghani
Do u mean u are planning to use an iterative approach (algorithm)? Or in contrast, you need to consider that in a one (single) consolidated model?

For the former, u need to define a parameter (or a dynamic set) that updates the set of equations in each iteration (after each solve statement simply) .

For the latter, you need to use available modeling techniques. [most likely integer programming ]

I hope that can help as a small initiator .
Regards

محمد صادق تولّلی
Mohammad Sadegh Tavallali
National University of Singapore


On Mon, Mar 18, 2013 at 6:48 PM, Mohamad Dehghani wrote:

Hello everyone,

I want to add a command in which if variable " f(i,j) " is lower than an amount, then it is omitted from the next equation .something like an “if and then command” .for example :

if f(i,j)=L=5, then put f(i,j)=e=0 .

(lets say f(‘1’,‘1’)=2 then we should have f(‘1’,‘1’)=e=0 for the next calculations.) .


thank you very much


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