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From Dmitriy Lyubimov <dlie...@gmail.com>
Subject Re: how to run PCA from Mahout
Date Tue, 06 Sep 2011 20:58:53 GMT
Ok, if you say so.

Do you think it would be worth considering adding PCA related options
to SSVD stuff?

On Tue, Sep 6, 2011 at 1:51 PM, Ted Dunning <ted.dunning@gmail.com> wrote:
> On Tue, Sep 6, 2011 at 12:42 PM, Dmitriy Lyubimov <dlieu.7@gmail.com> wrote:
>
>>
>> yes, there are tricks but that would change SVD contract and amend the
>> method, which is why I asked "without changing SVD contract", i.e.
>> without changing what A, U, Sigma and V mean in SVD step.
>>
>
> In a conventional program, changing the data types isn't really changing the
> contract.
>
> But I would guess that the MAHOUT-792 sequential code would run in roughly
> finite time on the data from the original poster.  A multi-threaded version
> would have an even better chance.
>

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