> 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/ _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
