Github user thvasilo commented on the pull request:
https://github.com/apache/flink/pull/861#issuecomment-114896951
> Actually, how about making the Categorical Histogram completely online
too? We could just take a numClasses there too, with a semantic difference that
in this case the number of buckets would be absolute, with a count and real
value associated with each bucket. The internal data structure would be a
hashmap now, with the maximum allowed size numClasses.
I like this approach.
> Adding a Utility method does certainly make sense. User will be supposed
to provide an argument depicting whether the values in DataSet[Double] are
continuous or discrete.
I think it's enough to assume that the values are continuous and use that
code.
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