Initializing help system before first use

QuadTermMap

  • public final class QuadTermMap
extends QuadExpression
    A quadratic expression. This class implements a quadratic expression as a map from variables to values.
    Since:
    43.00

    • Constructor Detail

      • QuadTermMap

        public QuadTermMap()
        Create a new empty expression.
        Since:
        43.00

      • QuadTermMap

        public QuadTermMap​(double constant)
        Create an expression with a constant term.
        Parameters:
        constant - Constant term in new expression.
        Since:
        43.00

    • Method Detail

      • deepCopy

        public QuadExpression deepCopy()
        Get a deep copy of this expression.
        Specified by:
        deepCopy in class  QuadExpression
        Returns:
        A deep copy of this expression.
        Since:
        43.00

      • deepCopy

        public QuadExpression deepCopy​(double factor)
        Get a deep copy of this expression multiplied by a constant
        Specified by:
        deepCopy in class  QuadExpression
        Parameters:
        factor - Factor to scale this with.
        Returns:
        A deep copy of this expression multiplied by factor.
        Since:
        43.00

      • reset

        public QuadTermMap reset()
        Clear this expression. Removes all terms and sets the constant to 0.
        Specified by:
        reset in class  QuadExpression
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(java.util.stream.Stream<Variable> variables,
                            java.util.stream.Stream<java.lang.Double> coefficients)
        Add multiple linear terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables and coefficients.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables - Variables.
        coefficients - Coefficients.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(java.util.stream.Stream<Variable> variables1,
                            java.util.stream.Stream<Variable> variables2,
                            java.util.stream.Stream<java.lang.Double> coefficients)
        Add multiple quadratic terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables1, variables2 and coefficients.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables1 - First variables.
        variables2 - Second variables.
        coefficients - Coefficients.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(java.lang.Iterable<Variable> variables,
                            java.lang.Iterable<java.lang.Double> coefficients)
        Add multiple terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables and coefficients.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables - Variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(java.lang.Iterable<Variable> variables1,
                            java.lang.Iterable<Variable> variables2,
                            java.lang.Iterable<java.lang.Double> coefficients)
        Add multiple terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables1, variables2 and coefficients.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables1 - First variables
        variables2 - Second variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(Variable[] variables,
                            double[] coefficients)
        Add multiple terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables and coefficients.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables - Variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(Variable[] variables1,
                            Variable[] variables2,
                            double[] coefficients)
        Add multiple terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables1, variables2 and coefficients.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables1 - First variables
        variables2 - Second variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(Variable[] variables,
                            double[] coefficients,
                            int offset,
                            int count)
        Add multiple terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables and coefficients using count elements starting from offset.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables - Variables
        coefficients - Coefficients
        offset - Offset into arrays.
        count - Number of elements to use from each array.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(Variable[] variables1,
                            Variable[] variables2,
                            double[] coefficients,
                            int offset,
                            int count)
        Add multiple terms to this expression. Adds the scalar product defined by the element-wise multiplication of variables1, variables2 and coefficients using count elements starting from offset.
        Overrides:
        addTerms in class  QuadExpression
        Parameters:
        variables1 - First variables
        variables2 - Second variables
        coefficients - Coefficients
        offset - Offset into arrays.
        count - Number of elements to use from each array.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadTermMap addTerm​(Variable variable,
                           double coefficient)
        Add a term to this expression. If the expression already has a coefficient for variable then the old and the new coefficients will be added.
        Specified by:
        addTerm in class  QuadExpression
        Parameters:
        variable - Variable.
        coefficient - Coefficient to add for variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadTermMap addTerm​(double coefficient,
                           Variable variable)
        Add a term to this expression. If the expression already has a coefficient for variable then the old and the new coefficients will be added.
        Specified by:
        addTerm in class  QuadExpression
        Parameters:
        coefficient - Coefficient to add for variable.
        variable - Variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadTermMap addTerm​(Variable x)
        Add term 1.0*x to this expression. If the expression already has a coefficient for x then the old and the new coefficients will be added.
        Specified by:
        addTerm in class  QuadExpression
        Parameters:
        x - Variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadTermMap addTerm​(Variable variable1,
                           Variable variable2,
                           double coefficient)
        Add a term to this expression. If the expression already has a coefficient for variable1*variable2 then the old and the new coefficients will be added.
        Specified by:
        addTerm in class  QuadExpression
        Parameters:
        variable1 - First variable.
        variable2 - Second variable.
        coefficient - Coefficient to add for variable1*variable2.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadTermMap addTerm​(double coefficient,
                           Variable variable1,
                           Variable variable2)
        Add a term to this expression. If the expression already has a coefficient for variable1*variable2 then the old and the new coefficients will be added.
        Specified by:
        addTerm in class  QuadExpression
        Parameters:
        coefficient - Coefficient to add for variable1*variable2.
        variable1 - First variable.
        variable2 - Second variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadTermMap addTerm​(Variable x1,
                           Variable x2)
        Add term 1.0*x1*x2 to this expression. If the expression already has a coefficient for x then the old and the new coefficients will be added.
        Specified by:
        addTerm in class  QuadExpression
        Parameters:
        x1 - First variable.
        x2 - Second variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(LinExpression expr)
        Add another linear expression to this expression.
        Specified by:
        addTerms in class  QuadExpression
        Parameters:
        expr - The expression to add
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(QuadExpression expr)
        Add another quadratic expression to this expression.
        Specified by:
        addTerms in class  QuadExpression
        Parameters:
        expr - The expression to add
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(LinExpression expr,
                            double factor)
        Add another linear expression to this expression.
        Specified by:
        addTerms in class  QuadExpression
        Parameters:
        expr - The expression to add.
        factor - Factor by which to multiply elements in expr before adding.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadTermMap addTerms​(QuadExpression expr,
                            double factor)
        Add another quadratic expression to this expression.
        Specified by:
        addTerms in class  QuadExpression
        Parameters:
        expr - The expression to add.
        factor - Factor by which to multiply elements in expr before adding.
        Returns:
        Always returns this.
        Since:
        43.00

      • setCoefficient

        public QuadTermMap setCoefficient​(Variable variable,
                                  double coefficient)
        Set the coefficient for a variable in this expression. Any existing coefficient will be overwritten.
        Parameters:
        variable - objects.Variable index.
        coefficient - New coefficient for variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • setCoefficient

        public QuadTermMap setCoefficient​(Variable variable1,
                                  Variable variable2,
                                  double coefficient)
        Set the coefficient for a variable product in this expression. Any existing coefficient will be overwritten.
        Parameters:
        variable1 - First variable index.
        variable2 - Second variable index.
        coefficient - New coefficient for variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • getCoefficient

        public double getCoefficient​(Variable variable)
        Get the coefficient for a variable.
        Parameters:
        variable - objects.Variable to query.
        Returns:
        The coefficient for variable in this expression.
        Since:
        43.00

      • getCoefficient

        public double getCoefficient​(Variable variable1,
                             Variable variable2)
        Get the coefficient for a variable product.
        Parameters:
        variable1 - First variable to query.
        variable2 - Second variable to query.
        Returns:
        The coefficient for variable in this expression.
        Since:
        43.00

      • addConstant

        public QuadTermMap addConstant​(double c)
        Add a value to the constant term of this expression.
        Specified by:
        addConstant in class  QuadExpression
        Parameters:
        c - The constant to add.
        Returns:
        Always returns this.
        Since:
        43.00

      • setConstant

        public QuadTermMap setConstant​(double c)
        Set the constant term in this expression. Any existing constant term will be overwritten.
        Specified by:
        setConstant in class  QuadExpression
        Parameters:
        c - New constant term for this expression
        Returns:
        Always returns this.
        Since:
        43.00

      • getConstant

        public double getConstant()
        Get the constant value in this expression.
        Specified by:
        getConstant in class  QuadExpression
        Returns:
        The constant value in this expression.
        Since:
        43.00

      • evaluate

        public double evaluate​(double[] solution)
        Compute the value of this expression with respect to the given solution vector (which is not required to be feasible).
        Specified by:
        evaluate in class  Expression
        Parameters:
        solution - Solution values for which the expression is evaluated.
        Returns:
        The value of this expression evaluated at solution.
        Since:
        43.00

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class  java.lang.Object
        Returns:
        Since:
        43.00
Parent Topic Class Summary

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