QuadraticObjective
class QuadraticObjective(quadratic_program, constant=0.0, linear=None, quadratic=None, sense=ObjSense.MINIMIZE)
Representation of quadratic objective function of the form: constant + linear * x + x * quadratic * x.
Constructs a quadratic objective function.
Parameters
- quadratic_program (
Any) – The parent quadratic program. - constant (
float) – The constant offset of the objective. - linear (
Union[ndarray,spmatrix,List[float],Dict[Union[int,str],float],None]) – The coefficients of the linear part of the objective. - quadratic (
Union[ndarray,spmatrix,List[List[float]],Dict[Tuple[Union[int,str],Union[int,str]],float],None]) – The coefficients of the quadratic part of the objective. - sense (
ObjSense) – The optimization sense of the objective.
Attributes
constant
Type: float
Returns the constant part of the objective function.
Return type
float
Returns
The constant part of the objective function.
linear
Type: qiskit.optimization.problems.linear_expression.LinearExpression
Returns the linear part of the objective function.
Return type
Returns
The linear part of the objective function.
quadratic
Type: qiskit.optimization.problems.quadratic_expression.QuadraticExpression
Returns the quadratic part of the objective function.
Return type
Returns
The quadratic part of the objective function.
quadratic_program
Type: Any
Returns the parent QuadraticProgram.
Return type
Any
Returns
The parent QuadraticProgram.
sense
Type: qiskit.optimization.problems.quadratic_objective.ObjSense
Returns the sense of the objective function.
Return type
ObjSense
Returns
The sense of the objective function.
Methods
evaluate
QuadraticObjective.evaluate(x)
Evaluate the quadratic objective for given variable values.
Parameters
x (Union[ndarray, List, Dict[Union[int, str], float]]) – The values of the variables to be evaluated.
Return type
float
Returns
The value of the quadratic objective given the variable values.