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Date: Fri, 04 Mar 2016 15:44:34 +0100
From: Gilles <gilles@harfang.homelinux.org>
To: <user@commons.apache.org>
Subject: Re: RealVector iterator
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Hello.

On Thu, 25 Feb 2016 23:03:13 +0000, Ziqi Zhang wrote:
> Thanks Giles
> I have created an issue
> https://issues.apache.org/jira/browse/MATH-1329
> <https://issues.apache.org/jira/browse/MATH-1329>
>
> Hope it gets fixed.
>

There are issues with sparse vectors/matrices in Commons Math.

  https://issues.apache.org/jira/browse/MATH-656
  https://issues.apache.org/jira/browse/MATH-765
  https://issues.apache.org/jira/browse/MATH-766

What you stumbled upon clearly shows that those features are not used 
much.

I've asked on the "dev" ML about the MATH-1329 issue.
Are you subscribed to that ML?

You could then submit a patch that would solve the problem in your 
case.
Maybe it'll start a discussion on the still pending issues which I 
mention
above.


Thanks,
Gilles


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