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https://issues.apache.org/jira/browse/SPARK-30762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17033376#comment-17033376
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Liang Zhang commented on SPARK-30762:
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Hi Hyukjin, I updated the description.
> Add dtype="float32" support to vector_to_array UDF
> --------------------------------------------------
>
> Key: SPARK-30762
> URL: https://issues.apache.org/jira/browse/SPARK-30762
> Project: Spark
> Issue Type: Story
> Components: MLlib, PySpark
> Affects Versions: 3.0.0
> Reporter: Liang Zhang
> Assignee: Liang Zhang
> Priority: Major
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Previous PR:
> [https://github.com/apache/spark/blob/master/python/pyspark/ml/functions.py]
> In the previous PR, we introduced a UDF to convert a column of MLlib Vecters
> to a column of lists in python (Seq in scala). Currently, all the floating
> numbers in a vector is converted to Double in scala. In this issue, we will
> add a parameter in the python function {{vector_to_array(col)}} that allows
> converting to Float (32bits) in scala, which would be mapped to a numpy array
> of dtype=float32.
>
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