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  • 最小二乘法 java

    import java.util.ArrayList;
    import java.util.Collection;
    
    import org.apache.commons.math3.optim.PointValuePair;
    import org.apache.commons.math3.optim.linear.LinearConstraint;
    import org.apache.commons.math3.optim.linear.LinearConstraintSet;
    import org.apache.commons.math3.optim.linear.LinearObjectiveFunction;
    import org.apache.commons.math3.optim.linear.Relationship;
    import org.apache.commons.math3.optim.linear.SimplexSolver;
    import org.apache.commons.math3.optim.nonlinear.scalar.GoalType;
    
    public class MathTest {
    
        public static void main(String[] args) {
            //describe the optimization problem
            LinearObjectiveFunction f = new LinearObjectiveFunction(new double[] { 3, 5}, 0);
    
            Collection<LinearConstraint> constraints = new ArrayList<LinearConstraint>();
            constraints.add(new LinearConstraint(new double[] { 2, 8}, Relationship.LEQ, 13));
            constraints.add(new LinearConstraint(new double[] { 5, -1}, Relationship.LEQ, 11));
    
            constraints.add(new LinearConstraint(new double[] { 1, 0}, Relationship.GEQ, 0));
            constraints.add(new LinearConstraint(new double[] { 0, 1}, Relationship.GEQ, 0));
    
            //create and run solver
            PointValuePair solution = null;
            solution = new SimplexSolver().optimize(f, new LinearConstraintSet(constraints), GoalType.MAXIMIZE);
    
            if (solution != null) {
                //get solution
                double max = solution.getValue();
                System.out.println("Opt: " + max);
    
                //print decision variables
                for (int i = 0; i < 2; i++) {
                    System.out.print(solution.getPoint()[i] + "	");
                }
            }
        }
    }

     java中调用commons.math3使用最小二乘法。

    在这里记录一下使用方法。

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  • 原文地址:https://www.cnblogs.com/xiaoba1203/p/6090348.html
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