AMPL offers superior support by our development and technical support teams.
Contact us for general queries, partnerships, and more.
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AMPL offers superior support by our development and technical support teams.
Contact us for general queries, partnerships, and more.
We can help you find the license and offering that works best for your situation.
Sample model from the AMPL book
model cut.mod;
data cut.dat;
option solver cplex, solution_round 6;
option display_1col 0, display_transpose -10;
problem Cutting_Opt: Cut, Number, Fill;
option relax_integrality 1;
problem Pattern_Gen: Use, Reduced_Cost, Width_Limit;
option relax_integrality 0;
let nPAT := 0;
for {i in WIDTHS} {
let nPAT := nPAT + 1;
let nbr[i,nPAT] := floor (roll_width/i);
let {i2 in WIDTHS: i2 <> i} nbr[i2,nPAT] := 0;
}
repeat {
solve Cutting_Opt;
let {i in WIDTHS} price[i] := Fill[i].dual;
solve Pattern_Gen;
if Reduced_Cost < -0.00001 then {
let nPAT := nPAT + 1;
let {i in WIDTHS} nbr[i,nPAT] := Use[i];
}
else break;
}
display nbr, Cut;
option Cutting_Opt.relax_integrality 0;
solve Cutting_Opt;
display Cut;