a portable command-line driven graphing utility originally created to allow scientists and students to visualize mathematical functions and data interactively. It has grown to support many non-interactive uses such as web scripting. It is also used as a plotting engine by third-party applications like CCP4 and Octave.
Please cite: Williams and Kelley. Gnuplot 4.5: an interactive plotting program. 2011. URL http://gnuplot.info. (Last accessed: YEAR MONTH DAY)