Originally posted by: sandeepsinghchauhan

tuple TP
{
   key int p;
   key int l ;
   float Cost;
}
{TP} PL  = ...;

p   l    Cost

1    1       10

1     2       30

1     3       40

2     1       230

2     2       90

2     3       130

dexpr float X[pl in PL] =  (pl.Cost * L[pl.p] + pl.Cost * M[pl.p] + pl.Cost * H[pl.p]) ;

i want to multiply L only with cost values whose l are 1, M with whose l values are 2 and H with when l are3.

how can i do this

please help

Hi,

Let me give you a small example you could improve:

 

tuple TP
{
   key int p;
   key int l ;
   float Cost;
}
{TP} PL  = {
<1  ,  1    ,   10>,
<1  ,   2   ,    30>,
<1   ,  3   ,    40>,
<2   ,  1   ,    230>,
<2  ,   2   ,    90>,
<2  ,   3   ,    130>
};

int L[i in 1..5]=i;
int M[i in 1..5]=10*i;
int H[i in 1..5]=100*i;

 
dvar float res;
dexpr float X[pl in PL] =  (pl.Cost* L[pl.p] + pl.Cost * M[pl.p] + pl.Cost * H[pl.p]) ;

subject to
{
res==X[first(PL)];
}

 

execute
{
writeln(res);
}

 

regards