If you have a little money, you may also consider getting an asset from the Marketplace. I have found these three:
marketplace.yoyogames.com
marketplace.yoyogames.com
marketplace.yoyogames.com
marketplace.yoyogames.com
Alternatively, a quick Google search gave me the links:
Hi there, I am using Game Maker 8.0 pro to build an evolution simulator. What I need to do now, is to write a script that could draw a cartesian graph (X-Y) from a table of values that are stored in a grid. It would be like turning the following into a continuous line on the screen: x y 1 10 2...
forum.yoyogames.com
Circular Health Bars/Progress Bars in GameMaker - Just Things Made By Dave
www.davetech.co.uk
I hope some are of interest to you!