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https://issues.apache.org/jira/browse/METRON-637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15815081#comment-15815081
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ASF GitHub Bot commented on METRON-637:
---------------------------------------
Github user cestella commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/401#discussion_r95371725
--- Diff:
metron-analytics/metron-statistics/src/test/java/org/apache/metron/statistics/StellarStatisticsFunctionsTest.java
---
@@ -356,6 +357,49 @@ public void testSkewness() throws Exception {
assertEquals(stats.getSkewness(), (Double) actual, 0.1);
}
+ @Test
+ public void testStatsBin() throws Exception {
--- End diff --
Given that it's not entirely obvious what this is doing and why it is a
valid test, do you think it merits a comment with the above in the test?
> Add a STATS_BIN function to Stellar.
> ------------------------------------
>
> Key: METRON-637
> URL: https://issues.apache.org/jira/browse/METRON-637
> Project: Metron
> Issue Type: Improvement
> Reporter: Casey Stella
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> When passing parameters to models, it's often useful to pass the binned
> representation of a variable based on an empirical statistical distribution,
> rather than the actual variable. This function should accept a set of
> percentile bins and a statistical sketch and a value. It should return the
> index where the percentile of the value falls.
> For instance, consider the value 17 who is percentile 27. If we use 25, 75,
> 95 to define our bins, this function would return 1, because its percentile,
> 27, is between 25 and 75.
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