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---
title: VQDResult
description: API reference for qiskit.algorithms.VQDResult
in_page_toc_min_heading_level: 1
python_api_type: class
python_api_name: qiskit.algorithms.VQDResult
---
# VQDResult
<Class id="qiskit.algorithms.VQDResult" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.24/qiskit/algorithms/eigen_solvers/vqd.py" signature="VQDResult" modifiers="class">
Bases: `VariationalResult`, [`EigensolverResult`](qiskit.algorithms.EigensolverResult "qiskit.algorithms.eigen_solvers.eigen_solver.EigensolverResult")
Deprecated: VQD Result.
The VQDResult class has been superseded by the [`qiskit.algorithms.eigensolvers.VQDResult`](qiskit.algorithms.eigensolvers.VQDResult "qiskit.algorithms.eigensolvers.VQDResult") class. This class will be deprecated in a future release and subsequently removed after that.
<Admonition title="Deprecated since version 0.24.0" type="danger">
The class `qiskit.algorithms.eigen_solvers.vqd.VQDResult` is deprecated as of qiskit-terra 0.24.0. It will be removed no earlier than 3 months after the release date. Instead, use the class `qiskit.algorithms.eigensolvers.VQDResult`.See [https://qisk.it/algo\_migration](https://qisk.it/algo_migration) for a migration guide.
</Admonition>
## Methods
<span id="qiskit-algorithms-vqdresult-combine" />
### combine
<Function id="qiskit.algorithms.VQDResult.combine" signature="VQDResult.combine(result)">
Any property from the argument that exists in the receiver is updated. :param result: Argument result with properties to be set.
**Raises**
**TypeError** Argument is None
</Function>
## Attributes
### aux\_operator\_eigenvalues
<Attribute id="qiskit.algorithms.VQDResult.aux_operator_eigenvalues">
Return aux operator expectation values.
These values are in fact tuples formatted as (mean, standard deviation).
</Attribute>
### cost\_function\_evals
<Attribute id="qiskit.algorithms.VQDResult.cost_function_evals">
Returns number of cost optimizer evaluations
</Attribute>
### eigenstates
<Attribute id="qiskit.algorithms.VQDResult.eigenstates">
return eigen state
</Attribute>
### eigenvalues
<Attribute id="qiskit.algorithms.VQDResult.eigenvalues">
returns eigen values
</Attribute>
### optimal\_circuit
<Attribute id="qiskit.algorithms.VQDResult.optimal_circuit">
The optimal circuits. Along with the optimal parameters, these can be used to retrieve the minimum eigenstate.
</Attribute>
### optimal\_parameters
<Attribute id="qiskit.algorithms.VQDResult.optimal_parameters">
Returns the optimal parameters in a dictionary
</Attribute>
### optimal\_point
<Attribute id="qiskit.algorithms.VQDResult.optimal_point">
Returns optimal point
</Attribute>
### optimal\_value
<Attribute id="qiskit.algorithms.VQDResult.optimal_value">
Returns optimal value
</Attribute>
### optimizer\_evals
<Attribute id="qiskit.algorithms.VQDResult.optimizer_evals">
Returns number of optimizer evaluations
</Attribute>
### optimizer\_result
<Attribute id="qiskit.algorithms.VQDResult.optimizer_result">
Returns the optimizer result
</Attribute>
### optimizer\_time
<Attribute id="qiskit.algorithms.VQDResult.optimizer_time">
Returns time taken for optimization
</Attribute>
</Class>