[
https://issues.apache.org/jira/browse/METRON-637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15770923#comment-15770923
]
ASF GitHub Bot commented on METRON-637:
---------------------------------------
Github user mattf-horton commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/401#discussion_r93683645
--- Diff:
metron-analytics/metron-statistics/src/test/java/org/apache/metron/statistics/StatisticalBinningPerformanceDriver.java
---
@@ -0,0 +1,76 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+package org.apache.metron.statistics;
+
+import com.google.common.collect.ImmutableList;
+import org.apache.commons.math3.random.GaussianRandomGenerator;
+import org.apache.commons.math3.random.MersenneTwister;
+import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * This is a driver to drive evaluation of the performance characteristics
of the STATS_BIN stellar function.
+ * It gets the distribution of the time it takes to calculate the bin of a
million random numbers against the quintile bins
+ * of a statistical distribution of 10000 normally distributed reals
between [-1000, 1000].
+ *
+ * On my 4 year old macbook pro, the values came out to be
+ *
+ * Min/25th/50th/75th/Max Milliseconds: 2687.0 / 2700.5 / 2716.0 / 2733.5
/ 3730.0
+ */
--- End diff --
Great to have this.
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
