|   | 1 |  initial version  | 
I don't think this is possible without using matplotlib in some way inside of Sage. I've opened http://trac.sagemath.org/ticket/19696 for this.
 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.