Recommend Commercial graphing library

[Jean-Michel Pichavant]

Pablo Recio Quijano wrote:
> Why must be commercial, when there is open and free alternatives? Like 
> GNU Plot.

Gnuplot is ugly. I'm using it because I don't care if it's ugly but it 
clearly lacks of look & feel for presentations, as requested by the OP.

You have
http://matplotlib.sourceforge.net/

which is free and looks better than gnuplot. I'm not sure it's well 
suited for presentation though.

JM