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https://issues.apache.org/jira/browse/FLINK-31029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fan Hong updated FLINK-31029:
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Description:
When one input column contains only 2 distinct values and their counts are
same, KBinsDiscretizer transforms this column to all 0s using `quantile`
strategy. An example of such column is `[0, 0, 0, 1, 1, 1]`.
When the 2 distinct values have different counts, the transformed values are
also all 0s, which cannot distinguish them.
was:When a input column contains only 2 distinct values, and their counts are
same,
> KBinsDiscretizer gives wrong bin edges in 'quantile' strategy when input data
> contains only 2 distinct values
> -------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-31029
> URL: https://issues.apache.org/jira/browse/FLINK-31029
> Project: Flink
> Issue Type: Bug
> Components: Library / Machine Learning
> Reporter: Fan Hong
> Priority: Major
>
> When one input column contains only 2 distinct values and their counts are
> same, KBinsDiscretizer transforms this column to all 0s using `quantile`
> strategy. An example of such column is `[0, 0, 0, 1, 1, 1]`.
> When the 2 distinct values have different counts, the transformed values are
> also all 0s, which cannot distinguish them.
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