Xu Yang created FLINK-13834:
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Summary: 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
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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