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From "Artem Barger (JIRA)" <>
Subject [jira] [Commented] (MATH-1372) Add argmin/argmax static functions to MathArrays utility class
Date Wed, 01 Jun 2016 14:16:59 GMT


Artem Barger commented on MATH-1372:

Well, I'm using these functions currently in my work quite often, which is not related to
kmeans implementations I'm working on rather some classification algorithms I'm working with.
Haven't found them in CM, hence asked in ML whenever they needed.
And yes, I see myself using it while implementing "Scalable Kmeans" alg. described here:
And for this I think decoupling of seeding procedure and actual LLoyd's iterations might be
a good start also in term of parallelization of clustering algorithms. 

> Add argmin/argmax static functions to MathArrays utility class
> --------------------------------------------------------------
>                 Key: MATH-1372
>                 URL:
>             Project: Commons Math
>          Issue Type: Wish
>            Reporter: Artem Barger
>            Assignee: Artem Barger
>            Priority: Trivial
>         Attachments: MATH-1372.patch
> Following conversation in the ML thread.
> Working lately w/ CM, I've found myself using a lot functions which helps to identify
the index of the min/max elements in given array of doubles. 
> In ML it was pointed out that similar functionality already exists in RealVector, however
due to MATH-765 it's planned to be removed (deprecated), moreover to use it one has to create
an instance of RealVector, where for simple cases it might be redundant.
> Hence I'd like to propose to add these static methods to the MathArrays utility class.

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