On Sep 28, 2006, at 6:34 AM, Patrick Lynch wrote:

> I haven't seen anything like this in the 'Pick Axe' book. I'll  
> check the
> Tk classes...if you know of anything that I can use, please pass it on
> to me...

I'm afraid I can't help you. I don't do that kind of programming with  
Ruby/Tk. When I need a line plot or any other kind of data plot, I  
use Mathematica.

Discussions previously appearing on this ML indicate you can drive  
GNUPlot from Ruby. You might look into that. Here a URL that could  
get started:

      http://rgnuplot.sourceforge.net/

Regards, Morton