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https://issues.apache.org/jira/browse/FLINK-13834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dong Lin closed FLINK-13834.
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Resolution: Won't Do
> Add class for PolynomialExpansionMapper
> ---------------------------------------
>
> Key: FLINK-13834
> URL: https://issues.apache.org/jira/browse/FLINK-13834
> Project: Flink
> Issue Type: Sub-task
> Components: Library / Machine Learning
> Reporter: Xu Yang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Polynomial expansion is the process of expanding your features into a
> polynomial space, which is formulated by an n-degree combination of original
> dimensions. Take a 2-variable feature vector as an example: (x, y), if we
> want to expand it with degree 2, then we get (x, x * x, y, x * y, y * y).
> * Add PolynomialExpansionMapper for the operation of the vector polynomial
> expansion.
> * Add VectorPolynomialExpandParams for the parameters of
> PolynomialExpansionMapper.
> * Add PolynomialExpansionMapperTest for the test example.
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