TSP in CPLEX Studio

Question

what is the dist array, and how do I fill it out for the next cost matrix?

[ 99 2 3 4 1 2 99 5 6 3 3 5 99 7 2 4 6 2 99 6 1 3 1 6 99 ]

I used the standard cplex solution

.mod:

int     n       = ...;
range   Cities  = 1..n;

tuple       edge {
    int i;
    int j;
}

setof(edge) Edges       = {<i,j> | ordered i,j in Cities};
int     dist[Edges] = ...;
 
dvar boolean x[Edges];
 

Answer 1

In

setof(edge) Edges       = {<i,j> | ordered i,j in Cities};
int     dist[Edges] = ...;

you expect to get a symmetrical matrix with only half of the (i,j) but in

[ 99 2 3 4 1 2 99 5 6 3 3 5 99 7 2 4 6 2 99 6 1 3 1 6 99 ]

you have provided the full 5*5 array.

So in your model you should change

setof(edge) Edges       = {<i,j> | ordered i,j in Cities};

into

setof(edge) Edges       = {<i,j> | i,j in Cities};