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| caption = 3D rendering of an [[ellipsoid]] by gnuplot
| released = {{Start date and age|1986|df=yes}}
| latest release version = {{wikidata|property|reference|P348}}
| latest release date = {{start date and age|{{wikidata|qualifier|P348|P577}}}}
| programming language = [[C (programming language)|C]]
| genre = [[List of graphing software|Plotting]]
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gnuplot can read data in multiple formats, including ability to read data on the fly generated by other programs ([[Pipe (Unix)|piping]]), create multiple plots on one image, do 2D, 3D, contour plots, parametric equations, supports various linear and non-linear coordinate systems, projections, geographic and time data reading and presentation, box plots of various forms, histograms, labels, and other custom elements on the plot, including shapes, text and images, that can be set manually, computed by script or automatically from input data.
gnuplot also provides scripting capabilities, looping, functions, text processing, variables, macros, arbitrary pre-processing of input data (usually across columns), as well as the ability to perform non-linear multi-dimensional multi-set weighted data fitting (see [[Curve fitting]] and [[Levenberg–Marquardt algorithm]]).
The gnuplot core code is programmed in [[C (programming language)|C]]. Modular subsystems for output via [[Qt (software)|Qt]], [[wxWidgets]], and LaTeX/TikZ/ConTeXt are written in [[C++]] and [[Lua (programming language)|Lua]].
[[File:Gnuplot-in-action.png|thumb|upright=1.4|gnuplot in interactive use
The code below creates the graph to the right.
<syntaxhighlight lang="gnuplot">
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</syntaxhighlight>
[[File:Gnuplot.ogv|thumb|Sample
{{Gallery
|width=240
|height=160
|File:Gnuplot tcp analysis.png|alt2=Thousands of dots plotted, forming a pattern|A [[scatter plot]] of samples from a text file
|File:Logarithmic spiral.svg|alt3=|A logarithmic spiral
}}
The name of this program was originally chosen to avoid conflicts with a program called "newplot", and was originally a compromise between "llamaplot" and "nplot".<ref>{{Cite web|url=http://www.gnuplot.info/faq/faq.html#x1-70001.2|title=gnuplot FAQ|website=Gnuplot.info|access-date=20 June 2024}}</ref>
Support of Epidemic daily and weekly formats in Version 5.4.2 is a result of pandemic
== Distribution terms ==
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* [[gretl]], a [[statistics package]] for [[econometrics]]
* JGNUPlot, a java-based GUI<ref>{{Cite web|url=
* Kayali<ref>{{Cite web|url=https://sourceforge.net/projects/kayali/|title=Kayali|website=Sourceforge.net|date=19 April 2013 |access-date=27 June 2022}}</ref> a [[computer algebra system]]
* xldlas, an old X11 statistics package<ref>{{Cite web |url=http://linux.maruhn.com/sec/xldlas.html |title=Xldlas - A basic statistical package for X windows |access-date=2014-10-30 |archive-url=https://web.archive.org/web/20141031022018/http://linux.maruhn.com/sec/xldlas.html |archive-date=2014-10-31 |url-status=dead }}</ref>
* gnuplotxyz, an old Windows program<ref>{{Cite web|url=http://www.uni-hamburg.de/Wiss/FB/15/Sustainability/schneider/gnuplot/|title = Home · uwe-schneider/Gnuplotxyz Wiki|website=Uni-hamburg}}</ref>
* wxPinter, a graphical plot manager for gnuplot<ref>{{cite web|title = Steingrube|url = http://www.steingrube-home.de/software_wxPinter.html|website = www.steingrube-home.de|access-date = 2015-08-21|first = Daniel S.|last = Steingrube|archive-url = https://web.archive.org/web/20151026154709/http://www.steingrube-home.de/software_wxPinter.html|archive-date = 2015-10-26|url-status = dead}}</ref>
* [[Maxima (software)|Maxima]] is a text-based [[computer algebra system]] which itself has several third-party GUIs
* [[Reduce (computer algebra system)|REDUCE]] is a text-based [[computer algebra system]]; versions using CSL have a GUI and there are several third-party GUIs
Other programs that use gnuplot include:
* [[GNU Octave]], a mathematical programming language
* statist, a terminal-based program<ref>{{Cite web|url=http://wald.intevation.org/projects/statist/|title = Wald: Statist: Project Home|website=Wald.intevation.org}}</ref>
* gplot.pl provides a simpler command-line interface.<ref>{{Cite web|url=
* [http://github.com/dkogan/feedgnuplot feedgnuplot] provides a plotting of stored and realtime data from a pipe
* ElchemeaAnalytical,<ref>{{Cite web|url=https://www.elchemea.com/|title=Elchemea Analytical|website=Elchemea.com|access-date=27 June 2022}}</ref> an [[impedance spectroscopy]] plotting and fitting program developed by DTU Energy<ref>{{Cite web|url=http://www.energy.dtu.dk/english|title=DTU Energy|website=Energy.dtu.dk|access-date=2016-05-24|archive-date=2021-04-14|archive-url=https://web.archive.org/web/20210414194356/https://www.energy.dtu.dk/english|url-status=dead}}</ref>
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== Programming and application interfaces ==
gnuplot can be used from various programming languages to graph data, including [[C++]] (via [
gnuplot also supports [[Pipe (Unix)|piping]], which is typical of scripts.<ref>{{Cite web|url=https://linuxgazette.net/168/misc/lg/2_cent_tip__piping_to_gnu_plot_from_c.html|title=2-cent Tip: Piping to GNU Plot from C|website=Linuxgazette.net|access-date=27 June 2022}}</ref> For script-driven graphics, gnuplot is one of the most popular programs.{{citation needed|date=October 2014}}
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