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From Debasish Das <debasish.da...@gmail.com>
Subject Re: apply simplex method to fix linear programming in spark
Date Mon, 02 Nov 2015 18:03:59 GMT
Use breeze simplex which inturn uses apache maths simplex...if you want to
use interior point method you can use ecos
https://github.com/embotech/ecos-java-scala ...spark summit 2014 talk on
quadratic solver in matrix factorization will show you example integration
with spark. ecos runs as jni process in every executor.
On Nov 1, 2015 9:52 AM, "Zhiliang Zhu" <zchl.jump@yahoo.com.invalid> wrote:

> Hi Ted Yu,
>
> Thanks very much for your kind reply.
> Do you just mean that in spark there is no specific package for simplex
> method?
>
> Then I may try to fix it by myself, do not decide whether it is convenient
> to finish by spark, before finally fix it.
>
> Thank you,
> Zhiliang
>
>
>
>
> On Monday, November 2, 2015 1:43 AM, Ted Yu <yuzhihong@gmail.com> wrote:
>
>
> A brief search in code base shows the following:
>
>     TODO: Add simplex constraints to allow alpha in (0,1).
> ./mllib/src/main/scala/org/apache/spark/mllib/clustering/LDA.scala
>
> I guess the answer to your question is no.
>
> FYI
>
> On Sun, Nov 1, 2015 at 9:37 AM, Zhiliang Zhu <zchl.jump@yahoo.com.invalid>
> wrote:
>
> Dear All,
>
> As I am facing some typical linear programming issue, and I know simplex
> method is specific in solving LP question,
> I am very sorry that whether there is already some mature package in spark
> about simplex method...
>
> Thank you very much~
> Best Wishes!
> Zhiliang
>
>
>
>
>
>

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