Could you help to provide a test case to verify this issue and open a JIRA
to track this? Also, are you interested in submit a PR to fix it? Thanks.

Sent from my Google Nexus 5
On Jul 27, 2014 11:07 AM, "Aureliano Buendia" <buendia...@gmail.com> wrote:

> Hi,
>
> The recently added NNLS implementation in MLlib returns wrong solutions.
> This is not data specific, just try any data in R's nnls, and then the same
> data in MLlib's NNLS. The results are very different.
>
> Also, the elected algorithm Polyak(1969) is not the best one around. The
> most popular one is Lawson-Hanson (1974):
>
> http://en.wikipedia.org/wiki/Non-negative_least_squares#Algorithms
>
>
>

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