Question

我编写了一个Google脚本来优化数学编程问题，但我无法弄清楚如何利用优化脚本在电子表格中显示最佳解决方案。

以下是Google脚本：

function myFunction() {
    var engine = LinearOptimizationService.createEngine();

    // Add variables, constraints and define the objective with addVariable(), addConstraint(), etc.
    // Add two variables, 0 <= x <= 10 and 0 <= y <= 5
    engine.addVariable('x', 0, 10);
    engine.addVariable('y', 0, 5);

    // Create the constraint: 0 <= 2 * x + 5 * y <= 10
    var constraint = engine.addConstraint(0, 10);
    constraint.setCoefficient('x', 2);
    constraint.setCoefficient('y', 5);

    // Create the constraint: 0 <= 10 * x + 3 * y <= 20
    var constraint = engine.addConstraint(0, 20);
    constraint.setCoefficient('x', 10);
    constraint.setCoefficient('y', 3);

    // Set the objective to be x + y
    engine.setObjectiveCoefficient('x', 1);
    engine.setObjectiveCoefficient('y', 1);

    // Engine should maximize the objective
    engine.setMaximization();

    // Solve the linear program
    var solution = engine.solve();

任何帮助将不胜感激。

Answer 1

下面提供了完整的工作代码。您需要添加一个函数来将解决方案写入活动电子表格。为此，我添加了一个新函数addSolution(solution)，然后将solution对象的每个成员写入各自的单元格。

function myFunction() {
     var engine = LinearOptimizationService.createEngine();

    // Add variables, constraints and define the objective with addVariable(), addConstraint(), etc.
   // Add two variables, 0 <= x <= 10 and 0 <= y <= 5
     engine.addVariable('x', 0, 10);
     engine.addVariable('y', 0, 5);

   // Create the constraint: 0 <= 2 * x + 5 * y <= 10
     var constraint = engine.addConstraint(0, 10);
     constraint.setCoefficient('x', 2);
     constraint.setCoefficient('y', 5);

    // Create the constraint: 0 <= 10 * x + 3 * y <= 20
     var constraint = engine.addConstraint(0, 20);
     constraint.setCoefficient('x', 10);
     constraint.setCoefficient('y', 3);

    // Set the objective to be x + y
     engine.setObjectiveCoefficient('x', 1);
     engine.setObjectiveCoefficient('y', 1);

    // Engine should maximize the objective
     engine.setMaximization();

   // Solve the linear program
     var solution = engine.solve();
     addProduct(solution)
}

function addSolution(solution) {
  var sheet = SpreadsheetApp.getActiveSheet();
  sheet.appendRow([solution.getObjectiveValue(), solution.getStatus(), solution.getVariableValue('x'), solution.getVariableValue('y'),solution.isValid()]);
}

Google脚本优化

1 个答案: