37 lines
2.6 KiB
Plaintext
37 lines
2.6 KiB
Plaintext
---
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title: multiclass_extensions
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description: API reference for qiskit.aqua.components.multiclass_extensions
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in_page_toc_min_heading_level: 2
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python_api_type: module
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python_api_name: qiskit.aqua.components.multiclass_extensions
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---
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<span id="module-qiskit.aqua.components.multiclass_extensions" />
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<span id="qiskit-aqua-components-multiclass-extensions" />
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# Multi-class Extensions
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<span id="module-qiskit.aqua.components.multiclass_extensions" />
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`qiskit.aqua.components.multiclass_extensions`
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A multiclass extension allows Aqua’s binary classifier algorithms, such as [`QSVM`](qiskit.aqua.algorithms.QSVM "qiskit.aqua.algorithms.QSVM") and [`SklearnSVM`](qiskit.aqua.algorithms.SklearnSVM "qiskit.aqua.algorithms.SklearnSVM") to handle more than two classes and do [multiclass classification](https://en.wikipedia.org/wiki/Multiclass_classification).
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The multiclass extensions use different techniques to perform multiclass classification using the underlying binary classifier.
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# Multiclass Extension Base Class
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| ------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------ |
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| [`MulticlassExtension`](qiskit.aqua.components.multiclass_extensions.MulticlassExtension "qiskit.aqua.components.multiclass_extensions.MulticlassExtension") | Base class for multiclass extension. |
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# Multiclass Extensions
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| ------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------- |
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| [`AllPairs`](qiskit.aqua.components.multiclass_extensions.AllPairs "qiskit.aqua.components.multiclass_extensions.AllPairs") | The All-Pairs multiclass extension. |
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| [`OneAgainstRest`](qiskit.aqua.components.multiclass_extensions.OneAgainstRest "qiskit.aqua.components.multiclass_extensions.OneAgainstRest") | The One Against Rest multiclass extension. |
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| [`ErrorCorrectingCode`](qiskit.aqua.components.multiclass_extensions.ErrorCorrectingCode "qiskit.aqua.components.multiclass_extensions.ErrorCorrectingCode") | The Error Correcting Code multiclass extension. |
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