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QuadExpression

  • Direct Known Subclasses:
    QuadTermList, QuadTermMap 
    public abstract class QuadExpression
extends AbstractExpression
    A quadratic expression that represents its data by a collection of terms. This is an abstract base class that is implement by different subclasses which use different data types to actually store the various terms in the expression.
    Since:
    43.00

    • Constructor Detail

      • QuadExpression

        public QuadExpression()

    • Method Detail

      • deepCopy

        public abstract QuadExpression deepCopy()
        Get a deep copy of this expression.
        Returns:
        A deep copy of this expression.
        Since:
        43.00

      • deepCopy

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

      • getConstant

        public abstract double getConstant()
        Get the constant value in this expression.
        Returns:
        The constant value in this expression.
        Since:
        43.00

      • addConstant

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

      • setConstant

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

      • reset

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

      • addTerms

        public QuadExpression 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.
        Parameters:
        variables - Variables.
        coefficients - Coefficients.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadExpression 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.
        Parameters:
        variables1 - First variables.
        variables2 - Second variables.
        coefficients - Coefficients.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadExpression 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.
        Parameters:
        variables - Variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadExpression 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.
        Parameters:
        variables1 - First variables
        variables2 - Second variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadExpression 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.
        Parameters:
        variables - Variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadExpression 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.
        Parameters:
        variables1 - First variables
        variables2 - Second variables
        coefficients - Coefficients
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

        public QuadExpression 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.
        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 QuadExpression 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.
        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 abstract QuadExpression 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.
        Parameters:
        variable - Variable.
        coefficient - Coefficient to add for variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public abstract QuadExpression 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.
        Parameters:
        coefficient - Coefficient to add for variable.
        variable - Variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public abstract QuadExpression 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.
        Parameters:
        x - Variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadExpression addTerm​(LinTerm term)
        Add term to this expression.
        Parameters:
        term - The term to add.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public QuadExpression addTerm​(QuadTerm term)
        Add term to this expression.
        Parameters:
        term - The term to add.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public abstract QuadExpression 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.
        Parameters:
        variable1 - First variable.
        variable2 - Second variable.
        coefficient - Coefficient to add for variable1*variable2.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public abstract QuadExpression 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.
        Parameters:
        coefficient - Coefficient to add for variable1*variable2.
        variable1 - First variable.
        variable2 - Second variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerm

        public abstract QuadExpression 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.
        Parameters:
        x1 - First variable.
        x2 - Second variable.
        Returns:
        Always returns this.
        Since:
        43.00

      • addTerms

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

      • addTerms

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

      • addTerms

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

      • create

        public static QuadExpression create()
        Create a new empty quadratic expression.
        Returns:
        The new quadratic expression.
        Since:
        43.00

      • create

        public static QuadExpression create​(double constant)
        Create a new quadratic expression with the specified constant term.
        Parameters:
        constant - The constant term to which the expression is initialized.
        Returns:
        The new quadratic expression.
        Since:
        43.00
Parent Topic Class Summary

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