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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2030) Implement an online histogram with Merging and equalization features
Date Thu, 20 Aug 2015 14:34:46 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14705009#comment-14705009
] 

ASF GitHub Bot commented on FLINK-2030:
---------------------------------------

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/861#discussion_r37535831
  
    --- Diff: flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/statistics/DiscreteHistogram.scala
---
    @@ -0,0 +1,126 @@
    +/*
    + * 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.flink.ml.statistics
    +
    +import scala.collection.mutable
    +
    +/** Implementation of a discrete valued online histogram
    --- End diff --
    
    A little bit more details would be helpful here.


> Implement an online histogram with Merging and equalization features
> --------------------------------------------------------------------
>
>                 Key: FLINK-2030
>                 URL: https://issues.apache.org/jira/browse/FLINK-2030
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Machine Learning Library
>            Reporter: Sachin Goel
>            Assignee: Sachin Goel
>            Priority: Minor
>              Labels: ML
>
> 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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