On 4/26/07, Anton Sherwood <anton.sherwood@gmail.com> wrote:

All I really need is the four highest eigenvalues and their vectors.
I'll have a look in "Python Cookbook" to see if there's a more
efficient way to do that partial sort.



Maybe "heapq.nlargest ()" is what you want?
http://www.python.org/doc/2.4/lib/module-heapq.html