Suraj Satishkumar Sheth created SPARK-3430:
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Summary: Introduce ValueIncrementableHashMapAccumulator to compute
Histogram
Key: SPARK-3430
URL: https://issues.apache.org/jira/browse/SPARK-3430
Project: Spark
Issue Type: Improvement
Components: Spark Core
Reporter: Suraj Satishkumar Sheth
Priority: Minor
Currently, we don't have a Hash map which can be used as an accumulator to
produce Histogram or distribution. This class will provide a customized HashMap
implemetation whose value can be incremented.
e.g. map+=(a,1), map+=(a,6) will lead to (a,7)
This can have various applications like computation of Histograms, Sampling
Strategy generation, Statistical metric computation, in MLLib, etc.
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