[18335fall08] sample Matlab files for pset 5

[Steven G. Johnson]

Hi gang,

To help you a bit with your Matlab coding, I've posted sample Matlab  
files for problems 2 and 3 that implement the matrices specified in  
those problems and also (unrestarted) Lanczos and steepest-descent  
(from lecture).  Look at the lecture 18 entry on:

http://math.mit.edu/~stevenj/18.335/

---SGJ