[Numpy-discussion] sort bug

Anton Sherwood anton.sherwood@gmail....
Sun Apr 29 13:15:59 CDT 2007


> Anton Sherwood wrote:
> > I'm using eigenvectors of a graph's adjacency matrix as "topological"
> > coordinates of the graph's vertices as embedded in 3space (something I
> > learned about just recently).  Whenever I've done this with a graph that
> > *does* have a good 3d embedding, using the first eigenvector results in
> > a flat model: apparently the first is not independent, at least in such
> > cases.  . . .

Charles R Harris wrote:
> . . . the embedding part sounds interesting,
> I'll have to think about why that works.

It's a mystery to me: I never did study enough matrix algebra to get a
feel for eigenvectors (indeed this is the first time I've had anything
to do with them).

I'll happily share my code with anyone who wants to experiment with it.

-- 
Anton Sherwood, http://www.ogre.nu/


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