Gnuplot is a command-line driven, interactive, function and data-plotting program for producing 2D and 3D plots. Although Gnuplot does not have as many features as some of the commercial mathematical software available. It is not as complex to use as packages such as Mathematica or Matlab. Gnuplot can be run under DOS, Windows, Macintosh OS, BeOS, OS2, VMS, Linux, and many other operating systems.
Official website for gnuplot 4. Includes downloads, screenshots, documentation, and links to other help and tutorials.
A Python package, that interfaces to Gnuplot allowing the use of Gnuplot from within Python to plot arrays of data from memory, data files, or mathematical functions.
Interface for ANSI C by Nicolas Devillard. Module enables sending display requests to a Gnuplot session through simple program calls. Includes documentation and downloads.
A Fortran 90/95 API, which provides routines that enable direct access to gnuplot from within a program. SourceForge page, with project summary, news, and source download.
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