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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2131) Add Initialization schemes for K-means clustering
Date Wed, 15 Jul 2015 12:51:04 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14627996#comment-14627996

ASF GitHub Bot commented on FLINK-2131:

Github user sachingoel0101 commented on the pull request:

    @thvasilo I've incorporated different initialization strategies in the KMeans algorithm
itself. Please review.

> Add Initialization schemes for K-means clustering
> -------------------------------------------------
>                 Key: FLINK-2131
>                 URL: https://issues.apache.org/jira/browse/FLINK-2131
>             Project: Flink
>          Issue Type: Task
>          Components: Machine Learning Library
>            Reporter: Sachin Goel
>            Assignee: Sachin Goel
> The Lloyd's [KMeans] algorithm takes initial centroids as its input. However, in case
the user doesn't provide the initial centers, they may ask for a particular initialization
scheme to be followed. The most commonly used are these:
> 1. Random initialization: Self-explanatory
> 2. kmeans++ initialization: http://ilpubs.stanford.edu:8090/778/1/2006-13.pdf
> 3. kmeans|| : http://theory.stanford.edu/~sergei/papers/vldb12-kmpar.pdf
> For very large data sets, or for large values of k, the kmeans|| method is preferred
as it provides the same approximation guarantees as kmeans++ and requires lesser number of
passes over the input data.

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