set - GAMS Definition of a Subset with k and k+1 -

so have following set:

i 1,2,3,...,i j 1,2,3,...,j k 1,2,3,...,k k´2,3,4,...,k 

i defining set , parameters via gdx-import through excel sheet can change set , parameters dynamically in order calculation study linear-programming model.

how define kind of set k´ works parameters d_kk´(distance k k´) , t_jkk´?

keep in mind solution has work on large scale @ least 1,...,100 every indice.

thanks lot. cheers, sam

sounds whant calculate distance between different points in set k. use alias set , multidimentional set:

set /1*i/     j /1*j/     k /1*k/     kk(k,k); alias(ka,k);  kk(k,ka)$(ord(k)<ord(ka))=yes;  parameter      x(k) 'x-koordinate'     y(k) 'y-koordinate'     d(k,k) 'distance k ka';  x(k)=uniform(0,1); y(k)=uniform(0,1);  d(k,ka)$kk(k,ka)=sqrt((x(k)-x(ka))^2+(y(k)-y(ka))^2);