Variable and equation attributes: .L and .M

The value of numerical results in attributes of variables, and equations may be included in a put employing the syntax

Put itemname.attribute(setdependency)

where any sets must be controlled in loop statements.  The colored entries just below involves the .L and .M variable and equation attributes reporting optimal variable levels and equation shadow price marginals as used within the example putex11.gms.

loop(scenarios,

    Need(Destinaton)=demandscen(destinaton,scenarios);

    Solve tranport using lp minimizing totalcost ;

    report("total","cost",scenarios)=totalcost.l;

    report("demand shadow price",Destinaton,scenarios)

            = demandbal.m(Destinaton);

    report("supply shadow price",Source,scenarios)

          = Supplybal.m(Source);

savtransport(Source,Destinaton,scenarios)=transport.l(Source,Destinaton);

    put 'Scenario name   ' scenarios.te(scenarios):14

    put @30 ' Optimality status     ' tranport.modelstat:2:0 /;

    put @30 ' Optimality status text ' tranport.Tmodstat /;

    put @30 ' Solver status         ' tranport.solvestat:2:0 /;

    put @30 ' Solver status text     ' tranport.Tsolstat /;

put //;

loop(Destinaton,

  put 'Report for ' , Destinaton.tl:15 "demand location in "

       scenarios.te(scenarios):0  " scenario" //;

  loop(source$transport.l(Source,Destinaton),

     put 'Incoming From ' source.tl @35;

     put transport.l(Source,Destinaton):10:0;

     put /;

      );

  put 'Quantity demanded ' @35

  put Need(Destinaton):10:0;

  put /;

         put 'Marginal Cost of meeting demand ' @35

         put  demandbal.m(Destinaton):10:2;

         put /

  put /;

    );

put / );

Part of the resultant output file follows with the red entries corresponding to the variable level attribute data generated by the put commands above and the blue the equation marginal attribute data.

Report for New York       demand location in Base Case scenario

Incoming From Seattle                     50

Incoming From San Diego                  275

Quantity demanded                        325

Marginal Cost of meeting demand       250.00

Report for Chicago        demand location in Base Case scenario

Incoming From Seattle                    300

Quantity demanded                        300

Marginal Cost of meeting demand       178.00

Notes: