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https://issues.apache.org/jira/browse/MATH-1509?focusedWorklogId=410121&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-410121
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ASF GitHub Bot logged work on MATH-1509:
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Author: ASF GitHub Bot
Created on: 26/Mar/20 07:34
Start Date: 26/Mar/20 07:34
Worklog Time Spent: 10m
Work Description: chentao106 commented on pull request #129: #MATH-1509:
Add missing documentation to class MiniBatchKMeansCluster…
URL: https://github.com/apache/commons-math/pull/129
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Issue Time Tracking
-------------------
Worklog Id: (was: 410121)
Time Spent: 1h 40m (was: 1.5h)
> Implement the MiniBatchKMeansClusterer
> --------------------------------------
>
> Key: MATH-1509
> URL: https://issues.apache.org/jira/browse/MATH-1509
> Project: Commons Math
> Issue Type: New Feature
> Reporter: Chen Tao
> Priority: Major
> Attachments: compare.png, intensive-data-comparsion-badcase.png,
> intensive-data-comparsion.png, random-data-comparison.png
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> MiniBatchKMeans is a fast clustering algorithm,
> which use partial points in initialize cluster centers, and mini batch in
> training iterations.
> It can finish in few seconds on clustering millions of data, and has few
> differences between KMeans.
> I have implemented it by Kotlin in my own project, and I'd like to contribute
> the code to Apache Commons Math, of course in java.
> My implemention is base on Apache Commons Math3, refer to Python
> sklearn.cluster.MiniBatchKMeans
> Thought test I found it works well on intensive data, significant performance
> improvement and return value has few difference to KMeans++, but has many
> difference on sparse data.
>
> Below is the comparation of my implemention and KMeansPlusPlusClusterer
> !compare.png!
>
> I have created a pull request on
> [https://github.com/apache/commons-math/pull/117], for reference only.
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