|   | 1 |  initial version  | 
your "default mode" setup needs to be in a separate cell. that's a bit of a bug, but on the other hand kind of self-referential and therefore doesn't work.
despite that, it somehow fails to evaluate which is probably an issue with how octave is embedded. I suggest you to open up a terminal and run octave directly. there it works fine.
 Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
 
                
                Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.