Xiangrui Meng created SPARK-4588:
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Summary: Add API for feature attributes
Key: SPARK-4588
URL: https://issues.apache.org/jira/browse/SPARK-4588
Project: Spark
Issue Type: Sub-task
Components: ML, MLlib
Reporter: Xiangrui Meng
Feature attributes, e.g., continuous/categorical, feature names, feature
dimension, number of categories, number of nonzeros (support) could be useful
for ML algorithms.
In SPARK-3569, we added metadata to schema, which can be used to store feature
attributes along with the dataset. We need to provide a wrapper over the
Metadata class for ML usage.
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