Xiangrui Meng created SPARK-8998:
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Summary: Collect enough frequent prefixes before projection in
PrefixSpan
Key: SPARK-8998
URL: https://issues.apache.org/jira/browse/SPARK-8998
Project: Spark
Issue Type: Improvement
Components: MLlib
Affects Versions: 1.5.0
Reporter: Xiangrui Meng
Assignee: Zhang JiaJin
The implementation in SPARK-6487 might have scalability issues when the number
of frequent items is very small. In this case, we can generate candidate sets
of higher orders using Apriori-like algorithms and count them, until we collect
enough prefixes.
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