flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From chiwanpark <...@git.apache.org>
Subject [GitHub] flink pull request: [Flink-2030][ml]Data Set Statistics and Histog...
Date Sun, 16 Aug 2015 09:38:44 GMT
Github user chiwanpark commented on a diff in the pull request:

    https://github.com/apache/flink/pull/861#discussion_r37144137
  
    --- Diff: docs/libs/ml/statistics.md ---
    @@ -0,0 +1,100 @@
    +---
    +mathjax: include
    +htmlTitle: FlinkML - Statistics
    +title: <a href="../ml">FlinkML</a> - Statistics
    +---
    +<!--
    +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.
    +-->
    +
    +* This will be replaced by the TOC
    +{:toc}
    +
    +## Description
    +
    + The statistics utility provides features such as building histograms over data, determining
    + mean, variance, gini impurity, entropy etc. of data.
    +
    +## Methods
    +
    + The Statistics utility provides two major functions: `createHistogram` and `dataStats`.
    +
    +### Creating a histogram
    +
    + There are two types of histograms:
    +   1. <strong>Continuous Histograms</strong>: These histograms are formed
on a data set `X:
    +   DataSet[Double]`
    +   when the values in `X` are from a continuous range. These histograms support
    +   `quantile` and `sum`  operations. Here `quantile(q)` refers to a value $x_q$ such
that $|x: x
    +   \leq x_q| = q * |X|$. Further, `sum(s)` refers to the number of elements $x \leq s$,
which can
    +    be construed as a cumulative probability value at $s$[Of course, <i>scaled</i>
probability].
    --- End diff --
    
    `<i>` tag can be replace by `*`. `<i>scaled</i>` can be represented
as `*scaled*`.


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.
---

Mime
View raw message