gnuplot - command-line driven graphing utility

gnuplot is a command-driven interactive function plotting program. It can be used to plot functions and data points in both two- and three-dimensional plots in many different formats. It is designed primarily for the visual display of scientific data.

• Plotting two-dimensional functions and data points in many different styles (points, lines, error bars)
• Plotting three-dimensional data points and surfaces in many different styles (contour plot, mesh)
• Algebraic computation in integer, float and complex arithmetic
• Data-driven model fitting using Marquardt-Levenberg minimization
• Support for a large number of operating systems, graphics file formats and output devices
• Extensive on-line help
• TEX-like text formatting for labels, titles, axes, data points
• Interactive command line editing and history (most platforms)