Xiangrui Meng created SPARK-6948:
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Summary: VectorAssembler should choose dense/sparse for output
based on number of zeros
Key: SPARK-6948
URL: https://issues.apache.org/jira/browse/SPARK-6948
Project: Spark
Issue Type: Improvement
Components: MLlib
Affects Versions: 1.4.0
Reporter: Xiangrui Meng
Now VectorAssembler only outputs sparse vectors. We should choose dense/sparse
format automatically, whichever uses less memory.
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