Re: [Help-glpk] Index i = -M, 0 ~~~(Decrementing) how to implement in this MathProg

[Noli.Sicad]

Sorry it k not j

Subject to Area:
 Summation (subscript j) in Xij + Win = Ai, i= -M,0 

Do syntax like this, works?

sum (i in -M, j in J)


Noli


-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Sicad, Noli (CMIT, Highett)
Sent: Tuesday, 19 October 2004 1:48 PM
To: address@hidden
Subject: [Help-glpk] Index i = -M,0 ~~~(Decrementing) how to implement
in this MathProg

I have a problem, i.e. constraint that requires index i decrementing
from -M to O, instead of usual incrementing by 1. How do AMPL/MathProg
decrement? How do we implement this in MathProg?

~~~~~
It goes this way (This is not a ampl/mathprog syntax)

Subject to Area:
 Summation (subscript k) in Xij + Win = Ai, i= -M,0 

Where: Ai = number of hectares present in period 1 that were regenerated
in period i, i= -M, 0 (hectares in each age-class).
~~~~~~

Thanks in advance.

Regards, Noli

 


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