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From Ted Dunning <>
Subject Re: how to run PCA from Mahout
Date Tue, 06 Sep 2011 20:51:53 GMT
On Tue, Sep 6, 2011 at 12:42 PM, Dmitriy Lyubimov <> 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

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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