Return-Path: 
 <issues-return-24680-apmail-flink-issues-archive=flink.apache.org@flink.apache.org>
X-Original-To: apmail-flink-issues-archive@minotaur.apache.org
Delivered-To: apmail-flink-issues-archive@minotaur.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 805F117BAC
	for <apmail-flink-issues-archive@minotaur.apache.org>;
 Sun, 16 Aug 2015 09:38:57 +0000 (UTC)
Received: (qmail 44364 invoked by uid 500); 16 Aug 2015 09:38:57 -0000
Delivered-To: apmail-flink-issues-archive@flink.apache.org
Received: (qmail 44317 invoked by uid 500); 16 Aug 2015 09:38:57 -0000
Mailing-List: contact issues-help@flink.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:issues-help@flink.apache.org>
List-Unsubscribe: <mailto:issues-unsubscribe@flink.apache.org>
List-Post: <mailto:issues@flink.apache.org>
List-Id: <issues.flink.apache.org>
Reply-To: dev@flink.apache.org
Delivered-To: mailing list issues@flink.apache.org
Received: (qmail 44307 invoked by uid 99); 16 Aug 2015 09:38:57 -0000
Received: from Unknown (HELO spamd3-us-west.apache.org) (209.188.14.142)
    by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 16 Aug 2015 09:38:57 +0000
Received: from localhost (localhost [127.0.0.1])
	by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org)
 with ESMTP id B74C71827D7
	for <issues@flink.apache.org>; Sun, 16 Aug 2015 09:38:56 +0000 (UTC)
X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org
X-Spam-Flag: NO
X-Spam-Score: 0.995
X-Spam-Level: 
X-Spam-Status: No, score=0.995 tagged_above=-999 required=6.31
	tests=[KAM_LAZY_DOMAIN_SECURITY=1, RP_MATCHES_RCVD=-0.006,
	URIBL_BLOCKED=0.001] autolearn=disabled
Received: from mx1-us-east.apache.org ([10.40.0.8])
	by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new,
 port 10024)
	with ESMTP id 47EWrM2ChIpJ for <issues@flink.apache.org>;
	Sun, 16 Aug 2015 09:38:46 +0000 (UTC)
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by mx1-us-east.apache.org (ASF Mail Server at mx1-us-east.apache.org) with
 SMTP id 8BC08428DF
	for <issues@flink.incubator.apache.org>;
 Sun, 16 Aug 2015 09:38:45 +0000 (UTC)
Received: (qmail 44172 invoked by uid 99); 16 Aug 2015 09:38:45 -0000
Received: from git1-us-west.apache.org (HELO git1-us-west.apache.org)
 (140.211.11.23)
    by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 16 Aug 2015 09:38:45 +0000
Received: by git1-us-west.apache.org (ASF Mail Server at
 git1-us-west.apache.org, from userid 33)
	id EED08DFD7B; Sun, 16 Aug 2015 09:38:44 +0000 (UTC)
From: chiwanpark <git@git.apache.org>
To: issues@flink.incubator.apache.org
Reply-To: issues@flink.incubator.apache.org
References: <git-pr-861-flink@git.apache.org>
In-Reply-To: <git-pr-861-flink@git.apache.org>
Subject: [GitHub] flink pull request: [Flink-2030][ml]Data Set Statistics and
 Histog...
Content-Type: text/plain
Message-Id: <20150816093844.EED08DFD7B@git1-us-west.apache.org>
Date: Sun, 16 Aug 2015 09:38:44 +0000 (UTC)

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.
---