Freehand Integration and Differentiation

Two years back I wrote a simple VB program to take a derivative and an integral of a function drawn by hand. It taught me a few things about basic Calculus, and even more about how not to draw sine functions. You can grab a copy of Freederiv and try it for yourself - with a tablet it becomes a great visualization tool. I will provide the source if I can ever find it, but it should be elementary to (re)write. Feel free to do so.

The obligatory screenshot(s):

(apparently my sines are more like linked semi-circles)

If you want to use it on Linux just run it through Wine. You will need two fairly standard Windows files for it to work. Simply copy "mscomctl.ocx" and "msvbvm60.dll" from the C:\WINDOWS\SYSTEM32\ directory of a Windows machine into your ~/.wine/drive_c/windows/system32/ directory.

(Freederiv running under Wine)

Stumble It!