Hi,
Any idea how this method will scale for dense matrices ?The kind of matrices I
am going to be working with are 500,000*500,000. Will this be a problem. Also
have you used this patch ?
Best Regards from Buffalo
Abhishek Agrawal
SUNY Buffalo
(7164357122)
On Wed 02/03/10 1:41 AM , Ganesh Swami ganesh@iamganesh.com sent:
> What about the MoorePenrose inverse?
>
> http://en.wikipedia.org/wiki/MoorePenrose_pseudoinverse
>
> The pseudoinverse coincides with the regular inverse when the matrix
> is nonsingular. Moreover, it can be computed using the SVD.
>
> Here's a patch for a MapReduce version of the SVD:
> https://issues.apache.org/jira/browse/MAHOUT180
> Ganesh
>
> On Tue, Feb 2, 2010 at 10:11 PM, <aa225@buffa
> lo.edu> wrote:> Hello People,
> > Â Â Â
> Â Â Â My name is Abhishek Agrawal. For
> the last few days I have been trying> to figure out how to calculate the
inverse of a
> matrix using Map Reduce. Matrix> inversion has 2 common approaches. Gaussian
> Jordan and the cofactor of transpose> method. But both of them dont seem to be
suited
> too well for Map Reduce.> Gaussian Jordan involves blocking co factoring a
> matrix requires repeated> calculation of determinant.
> >
> > Can some one give me any pointers so as to how
> to solve this problem ?>
> > Best Regards from Buffalo
> >
> > Abhishek Agrawal
> >
> > SUNY Buffalo
> > (7164357122)
> >
> >
> >
> >
>
>
>
>
>
