Re: [AIMMS] How to use the idea of subset to input the values of parameters

[Leonardo Moraes]

Zack,

smallvehicle and truck are subsets or binary parameters?

If they are subsets, so they should not be defined as smallvehicle(i) nor truck(i), but as smallvehicle and truck (without the car index i). Thus, supposing they are subsets of the original cars set, you should use:

carspeed(i | i in smallvehicle) := 40;

carspeed(i | i in truck) := 25;

But, if they are binary parameters, for instance, smallvehicle(i) = 1 represents car i is a smallvehicle, then you should use:

carspeed(i | smallvehicle(i)) := 40;

carspeed(i | truck(i)) := 25;

Best regards,

Leonardo.

2013/5/20 Zack Shih <short...@gmail.com>

Hi All:

In GAMS, a kind of function can be used to input the value of parameter.  

For ex:

parameter carspeed(i)   ## i is the no. of the car

carspeed(smallvehicle(i))=40;

carspeed(truck(i))=25;     

## smallvehicle(i) and truck(i) are subsets of cars 

My question is, does anyone know how to similar idea to input values of parameters in AIMMS?

Thanks!         

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