I figured the math capabilities of DQSD needed a graphical interface. I adapted Walter Zorn's Online function grapher [walterzorn.com] into a plotting tool that can be used from DQSD on or offline. There are still a couple bugs, but it should work 99% of the time for any function(s) of x.
Find it here: http://home.comcast.net/~ryan_carpenter/dqsd/
-Ryan
