nested For

[Alessandro Oscar Gilardino Arias]

Dear all, I would like to know if you can explain me the difference between the following two statements:

In the first one I would like to do something like: For {i in set1, j in set2} {.....statement.....};

subject to constraint1 {i in set1, j in set2}:

In the second I want something like a nested for function, something like: For{i in set1} { For {j in set2} {.......statement........}};

I am trying to do the following:

subject to constraint2 {i in set1} : {j in set2} : 

but I get a sintax error. 

Also, both constraint are the same?

Regards

[Robert Fourer]

There is nothing like a nested loop in an AMPL "subject to" statement. You have to write a single indexing set, such as in your first example,

subject to constraint1 {i in set1, j in set2}: ...

when specifying a collection of constraints.

Bob Fourer
am...@googlegroups.com

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[Alessandro Oscar Gilardino Arias]

thanks a lot!

Alessandro Gilardino Arias

Red Peruana de Ciclo de Vida

Departamento de Ingenieria

Pontificia Universidad Catolica del Peru

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