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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: Understanding Mahout's Hadoop SVD results - eigenvectors/values vs decomposed matrices
Date Fri, 25 Feb 2011 22:25:55 GMT
I don't think we have a single method for this, but it would be very easy to
implement.

On Fri, Feb 25, 2011 at 1:21 PM, Dmitriy Lyubimov <dlieu.7@gmail.com> wrote:

> Ok, thank you, Ted.
>
> The reason i am actually asking is fold-in jobs in LSI which are basically
> very similar operation (multiplication + scaling). Because if you could do
> it with DRM
> method, i would just need to describe what to call or run. Sorry for the
> offtopic.
>
> -Dmitriy
>
> On Fri, Feb 25, 2011 at 1:05 PM, Ted Dunning <ted.dunning@gmail.com>
> wrote:
>
> > I think that lanczos may already do this.  The correction for the
> diagonal
> > matrix just involves weighting the output rows as they are produced.  I
> > don't know that is in any explicit code.  You may not even want it if you
> > want to get scaled left (right) eigenvectors.
> >
>

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