147 lines
4.4 KiB
Plaintext
147 lines
4.4 KiB
Plaintext
---
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title: BaseDataProvider (v0.31)
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description: API reference for qiskit.finance.data_providers.BaseDataProvider in qiskit v0.31
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in_page_toc_min_heading_level: 1
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python_api_type: class
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python_api_name: qiskit.finance.data_providers.BaseDataProvider
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---
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# BaseDataProvider
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<Class id="qiskit.finance.data_providers.BaseDataProvider" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-aqua/tree/stable/0.9/qiskit/finance/data_providers/_base_data_provider.py" signature="BaseDataProvider" modifiers="class">
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Bases: `abc.ABC`
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The abstract base class for data\_provider modules within Qiskit’s finance module.
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To create add-on data\_provider module subclass the BaseDataProvider class in this module. Doing so requires that the required driver interface is implemented.
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To use the subclasses, please see [https://github.com/Qiskit/qiskit-tutorials/blob/stable/0.25.x/tutorials/finance/11\_time\_series.ipynb](https://github.com/Qiskit/qiskit-tutorials/blob/stable/0.25.x/tutorials/finance/11_time_series.ipynb)
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## Methods
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<span id="qiskit-finance-data-providers-basedataprovider-get-coordinates" />
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### get\_coordinates
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<Function id="qiskit.finance.data_providers.BaseDataProvider.get_coordinates" signature="BaseDataProvider.get_coordinates()">
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Returns random coordinates for visualisation purposes.
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**Return type**
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`Tuple`\[`ndarray`, `ndarray`]
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</Function>
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<span id="qiskit-finance-data-providers-basedataprovider-get-covariance-matrix" />
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### get\_covariance\_matrix
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<Function id="qiskit.finance.data_providers.BaseDataProvider.get_covariance_matrix" signature="BaseDataProvider.get_covariance_matrix()">
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Returns the covariance matrix.
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**Return type**
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`ndarray`
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**Returns**
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an asset-to-asset covariance matrix.
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**Raises**
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[**QiskitFinanceError**](qiskit.finance.QiskitFinanceError "qiskit.finance.QiskitFinanceError") – no data loaded
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</Function>
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<span id="qiskit-finance-data-providers-basedataprovider-get-mean-vector" />
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### get\_mean\_vector
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<Function id="qiskit.finance.data_providers.BaseDataProvider.get_mean_vector" signature="BaseDataProvider.get_mean_vector()">
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Returns a vector containing the mean value of each asset.
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**Return type**
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`ndarray`
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**Returns**
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a per-asset mean vector.
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**Raises**
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[**QiskitFinanceError**](qiskit.finance.QiskitFinanceError "qiskit.finance.QiskitFinanceError") – no data loaded
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</Function>
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<span id="qiskit-finance-data-providers-basedataprovider-get-period-return-covariance-matrix" />
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### get\_period\_return\_covariance\_matrix
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<Function id="qiskit.finance.data_providers.BaseDataProvider.get_period_return_covariance_matrix" signature="BaseDataProvider.get_period_return_covariance_matrix()">
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Returns a vector containing the mean value of each asset.
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**Return type**
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`ndarray`
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**Returns**
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a per-asset mean vector.
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**Raises**
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[**QiskitFinanceError**](qiskit.finance.QiskitFinanceError "qiskit.finance.QiskitFinanceError") – no data loaded
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</Function>
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<span id="qiskit-finance-data-providers-basedataprovider-get-period-return-mean-vector" />
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### get\_period\_return\_mean\_vector
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<Function id="qiskit.finance.data_providers.BaseDataProvider.get_period_return_mean_vector" signature="BaseDataProvider.get_period_return_mean_vector()">
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Returns a vector containing the mean value of each asset.
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**Return type**
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`ndarray`
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**Returns**
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a per-asset mean vector.
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**Raises**
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[**QiskitFinanceError**](qiskit.finance.QiskitFinanceError "qiskit.finance.QiskitFinanceError") – no data loaded
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</Function>
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<span id="qiskit-finance-data-providers-basedataprovider-get-similarity-matrix" />
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### get\_similarity\_matrix
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<Function id="qiskit.finance.data_providers.BaseDataProvider.get_similarity_matrix" signature="BaseDataProvider.get_similarity_matrix()">
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Returns time-series similarity matrix computed using dynamic time warping.
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**Return type**
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`ndarray`
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**Returns**
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an asset-to-asset similarity matrix.
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**Raises**
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[**QiskitFinanceError**](qiskit.finance.QiskitFinanceError "qiskit.finance.QiskitFinanceError") – no data loaded
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</Function>
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<span id="qiskit-finance-data-providers-basedataprovider-run" />
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### run
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<Function id="qiskit.finance.data_providers.BaseDataProvider.run" signature="BaseDataProvider.run()" modifiers="abstract">
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Loads data.
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**Return type**
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`None`
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</Function>
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</Class>
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