Could you give me a reference for the "discrete option" in spectral
clustering?
vince
On 31 January 2013 13:58, Olivier Grisel <olivier.gri...@ensta.org> wrote:
> 2013/1/31 Gael Varoquaux <gael.varoqu...@normalesup.org>:
> > On Thu, Jan 31, 2013 at 08:17:02AM -0500, Satrajit Ghosh wrote:
> >> the problem that this causes is in comparing clusters from two similar
> >> datasets. are the clusters different because they reflect different
> >> properties or simply differences in local minima.
> >
> > Because clustering is so much of an ill-posed problem in noisy and
> > high-dimensional situations, as in neuroimaging, such comparison is
> > difficult and often imposible.
> >
> > Quite often people believe way too much in the clustering results that
> > they get: it is not clear that the clusters are identifiable from the
> > data.
>
> Ensemble clustering might help you identify stable substructures (e.g.
> a ranking on the stability of pairs of samples for instance).
>
> --
> Olivier
> http://twitter.com/ogrisel - http://github.com/ogrisel
>
>
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