gnuplot is a command driven program used for plotting mathematical functions and two-dimensional data on a variety of terminal types.
If files are given, gnuplot loads each file with the load command, in the order specified. gnuplot exits after the last file is processed.
Some features include the ability to plot any number of functions, compare actual data to theoretical curves, user-defined X and Y ranges, as well as user-defined functions and constants. A number of devices can be specified from printing the plots.
gnuplot includes both a man page and a help command. A gnuplot manual is available; consult your system administrator.
To invoke the package simply type gnuplot.