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https://issues.apache.org/jira/browse/FLINK-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985273#comment-14985273
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Daniel Blazevski commented on FLINK-1934:
-----------------------------------------

[~till.rohrmann] , I have been looking to approximate knn algorithms.  I found 
here in Ref. [3] that I added in the Description above.  Ref. [3] is cited 
several times in Ref. [1], and [3] mentions that the method of z-functions is 
best for dimensions < 10, and that locality sensitive hashing (LSH) is better 
for dimensions ~ 30 and above.  

How about I give Ref [1] a shot, and maybe later down the road add LSH?  If so, 
feel free to assign me to this issue.

> Add approximative k-nearest-neighbours (kNN) algorithm to machine learning 
> library
> ----------------------------------------------------------------------------------
>
>                 Key: FLINK-1934
>                 URL: https://issues.apache.org/jira/browse/FLINK-1934
>             Project: Flink
>          Issue Type: New Feature
>          Components: Machine Learning Library
>            Reporter: Till Rohrmann
>            Assignee: Raghav Chalapathy
>              Labels: ML
>
> kNN is still a widely used algorithm for classification and regression. 
> However, due to the computational costs of an exact implementation, it does 
> not scale well to large amounts of data. Therefore, it is worthwhile to also 
> add an approximative kNN implementation as proposed in [1,2].  Reference [3] 
> is cited a few times in [1], and gives necessary background on the z-value 
> approach.
> Resources:
> [1] https://www.cs.utah.edu/~lifeifei/papers/mrknnj.pdf
> [2] http://www.computer.org/csdl/proceedings/wacv/2007/2794/00/27940028.pdf
> [3] http://cs.sjtu.edu.cn/~yaobin/papers/icde10_knn.pdf



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