GradientDescentState
class qiskit.algorithms.optimizers.GradientDescentState(x, fun, jac, nfev, njev, nit, stepsize, learning_rate)
Bases: OptimizerState
State of GradientDescent.
Dataclass with all the information of an optimizer plus the learning_rate and the stepsize.
Attributes
stepsize
Typ: float | None
Norm of the gradient on the last step.
learning_rate
Typ: LearningRate
Learning rate at the current step of the optimization process.
It behaves like a generator, (use next(learning_rate) to get the learning rate for the next step) but it can also return the current learning rate with learning_rate.current.
x
Typ: POINT
Current optimization parameters.
fun
Typ: Callable[[POINT], float] | None
Function being optimized.
jac
Typ: Callable[[POINT], POINT] | None
Jacobian of the function being optimized.
nfev
Typ: int | None
Number of function evaluations so far in the optimization.
njev
Typ: int | None
Number of jacobian evaluations so far in the opimization.
nit
Typ: int | None
Number of optimization steps performed so far in the optimization.