* sci-visualization/gnuplot
Homepage: http://www.gnuplot.info/
Description: Command-line driven interactive plotting program
Gnuplot's web site has a large section with many examples. It also has a very detailed handbook. What it is lacking is a very simple tutorial to get people started.
From the start, you need to be aware that gnuplot can work in three modes: a fully interactive way, by loading a plot configuration file during an interactive session, or in a non-interactive way. We are going to explore each of these three ways.
