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http://www.gnuplot.info/
Gnuplot is a portable command-line driven interactive data and function plotting utility for UNIX, IBM OS/2, MS Windows, DOS, Macintosh, VMS, Atari and many other platforms. The software is copyrighted but freely distributed (i.e., you don't have to pay for it). It was originally intended as to allow scientists and students to visualize mathematical functions and data. It does this job pretty well, but has grown to support many non-interactive uses, including web scripting and integration as a plotting engine for third-party applications like Octave. Gnuplot has been supported and under development since 1986.
Gnuplot supports many types of plots in either 2D and 3D. It can draw using lines, points, boxes, contours, vector fields, surfaces, and various associated text. It also supports various specialized plot types. Demos here.
Gnuplot supports many different types of output: interactive screen terminals (with mouse and hotkey functionality), direct output to pen plotters or modern printers (including postscript and many color devices), and output to many types of file (eps, fig, jpeg, LaTeX, metafont, pbm, pdf, png, postscript, svg, ...) Gnuplot is easily extensible to include new devices. Recent additions include interactive terminals based on aquaterm (OSX) and wxWidgets (multiple platforms).
gnuplot demo plots
You can see plenty of live screenshots if you run gnuplot interactively and type command gnuplot> load "all.dem"
in gnuplot's demo/ directory — it should be part of your installation, otherwise get it from the source code archive or file-by-file from cvs. Hint: you can get a single big postscript file of all the demo plots by the following sequence of commands
gnuplot> set terminal postscript color solid
gnuplot> set output "all_demos.ps"
gnuplot> load "all.dem"
gnuplot> set output
gnuplot> set terminal pop
Indexed onlines versions available right here:
| Version 4.0 demos | Version 4.2 demos | CVS Version demos |
|---|---|---|
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| Current officially released version is gnuplot 4.2 (released on 3 March 2007).
| Previous version gnuplot 4.0 (16 April 2004).
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| Development version (gnuplot 4.3) on SourceForge CVS New features are being added regularly. You are welcome to build gnuplot from the CVS source code or download a testing binary. You will find instructions and more information on the development page.
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