I just watched John Hunter's wonderful talk at the SciPy2012 http://blog.enthought.com/general/john-hunter/ (and made a donation to his family) Do we have the Ipython notebook he presented? hunter_scipy2012.ipynb Thanks, Rich -- Dr. Richard P. Signell (508) 457-2229 USGS, 384 Woods Hole Rd. Woods Hole, MA 02543-1598