mahout-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: Need a little help with using SVD
Date Mon, 14 Mar 2011 05:41:31 GMT
Yeah... SVD is pretty expensive compared to the lightning fast integration
of random projection into a map-phase.

On Sun, Mar 13, 2011 at 8:55 PM, Dmitriy Lyubimov <dlieu.7@gmail.com> wrote:

> On Sun, Mar 13, 2011 at 8:18 PM, Ted Dunning <ted.dunning@gmail.com>
> wrote:
> > For clustering purposes, you probably don't even need SVD here.  You can
> > project randomly down to 100-200 dimensions and do the clustering.  You
> have
> > to use a higher number of dimensions than you would with SVD, but
> avoiding
> > the SVD is a big win.
>
> Is it because of running time (efficiency) of SVD or there's something
> else?
>
> Thanks.
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message