zhengruifeng created SPARK-30398:
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Summary: PCA/RegressionMetrics/RowMatrix avoid unnecessary
computation
Key: SPARK-30398
URL: https://issues.apache.org/jira/browse/SPARK-30398
Project: Spark
Issue Type: Improvement
Components: ML, MLlib
Affects Versions: 3.0.0
Reporter: zhengruifeng
use Summarizer instead of MultivariateOnlineSummarizer to avoid computation of
unused metrics
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