gnuplot

GnuPlot is a utility for drawing charts for Linux.

Useful links

• GnuPlot Demos

• How to create a stacked area graph with gnuplot

  Uses a Perl script to sum the columns up to create a stacked graph.

• StackOverflow - draw stacked line chart

  One of the answers contains an example of how to do calculations in the gnuplot script.

• Tips for nice looking charts from a CSV file
• GnuPlot graphs examples
• Lines and arrows