mavlink/qgroundcontrol — pull request #724 by Susurrus (2014-06-25 06:07:29+00:00)
Title: Plotting data now defaults to drawing a line with no symbols.

Also deleted invalid line drawing options.

This code should really all be fixed or deleted. It's quite a hodge-podge of broken code (can't actually export and re-import properly) and should be handled by MATLAB or pymavlink+matplotlib instead.