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https://issues.apache.org/jira/browse/FLINK-2030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14730867#comment-14730867
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ASF GitHub Bot commented on FLINK-2030:
---------------------------------------
Github user sachingoel0101 commented on the pull request:
https://github.com/apache/flink/pull/861#issuecomment-137748205
Hello @thvasilo , I was unable to access the `create...` functions from the
scala API. I'm not sure how to pass a `DataSet[Double]` to a
`DataSet[java.lang.Double]` function. I am using the following right now:
```scala
class DoubleDataSetUtils(val self: DataSet[Double]) {
def createDiscreteHistogram: DataSet[DiscreteHistogram] = {
wrap(jutils.DataSetUtils.createDiscreteHistogram(self.javaSet))
}
}
implicit def utilsToDoubleDataSet(dataSet: DataSet[Double]) = new
DoubleDataSetUtils(dataSet)
```
I'm not terribly familiar with the `TypeInformation` and `ClassTag`
mechanisms.
As for docs, where should I put them? Currently, the java docs for the
class themselves are written properly. However, there is a file named
`zip_elements_guide.md` under `apis` folder. Should I rename that instead to
`Data Set Utilities` and add histogram docs there itself?
> Implement discrete and continuous histograms
> --------------------------------------------
>
> Key: FLINK-2030
> URL: https://issues.apache.org/jira/browse/FLINK-2030
> Project: Flink
> Issue Type: Sub-task
> Components: Core
> Reporter: Sachin Goel
> Assignee: Sachin Goel
> Priority: Minor
>
> For the implementation of the decision tree in
> https://issues.apache.org/jira/browse/FLINK-1727, we need to implement an
> histogram with online updates, merging and equalization features. A reference
> implementation is provided in [1]
> [1].http://www.jmlr.org/papers/volume11/ben-haim10a/ben-haim10a.pdf
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