[jira] [Closed] (FLINK-13834) Add class for PolynomialExpansionMapper

["Dong Lin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-13834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dong Lin closed FLINK-13834.
----------------------------
    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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