Re: [Help-glpk] manipulating parameter indices

[Kevin Hunter]

At 12:59am -0400 Sat, 30 Jun 2012, Glpk Xypron wrote:
> try the following:
>
> set EFF, dimen 5;
> set inputs := setof{(i,p,v,o,e) in EFF}i;
> set process := setof{(i,p,v,o,e) in EFF}p;
> set vintage := setof{(i,p,v,o,e) in EFF}v;
> set outputs := setof{(i,p,v,o,e) in EFF}o;
> set S := setof{(i,p,v,o,e) in EFF} (i,p,v,o);
> param eff{(i,p,v,o) in S} := sum{(i,p,v,o,e) in EFF}e;
> solve;
> display eff;
> data;
> set EFF :=
> # input     process        vintage output      efficieny
>    coal      coal_pp        2015    electricity 0.4
>    uranium   nuclear_pp     2015    electricity 0.4
>    sunlight  passive_solar  2020    heat        0.6;
> end;

Most excellent!  I was not aware that I could use sets in this manner. 
That is exactly the functionality for which I was searching.  Thank you.

I was similarly not aware of how to use setof, and with this piece, I 
was able to clean up a bunch of other sections to my model as well.

Thank you again,

Kevin