[gradsusr] outlining a shape in a difference plot

Wed Jul 2 00:39:08 EDT 2014

Hello fellow grads users,

I have a difference plot and i want to outline the region with the greatest
difference.
I am attaching the figure here.. any idea on how can i do this?

There is a shape in this figure that i want to outline.

thanks for any help.
*Lyndon Mark P. Olaguera*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20140702/8c3d1532/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: lh_1_fill.gif
Type: image/gif
Size: 20004 bytes
Desc: not available
Url : http://gradsusr.org/pipermail/gradsusr/attachments/20140702/8c3d1532/attachment-0001.gif 