Topic: Gnuplot is a portable command-line driven interactive data and function plotter.

[Software Santa]

Gnuplot is a portable command-line driven interactive data and function plotter.

Written for DOS, OS/2, Mac OS X, and Windows.

Gnuplot  is a portable command-line driven interactive data and function plotting utility.

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.

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 formats (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).

Demo scripts for gnuplot CVS version

Gnuplot is distributed with a large set of scripts that demonstrate various features.

Basic 2D plot styles

    * simple functions
    * filled curves
    * fill between curves
    * candlesticks
    * error bars
    * histograms
    * step functions
    * multiple axis scales
    * mixing styles
    * variable size points
    * parametric functions
    * vector fields
    * circles

Math functions and
curve fitting

    * approximation
    * B-splines
    * Bezier splines
    * parameter fitting
    * probability
    * probability (more)
    * random numbers
    * recursion, etc...

Animation

    * animated gif

   
Surfaces and
3D plotting

    * surfaces 1
    * surfaces 2
    * contours
    * singularities
    * hidden surfaces
    * pm3d coloring
    * pm3d hidden surfaces
    * 3D mapping

Coordinate and
axis transforms

    * polar coords
    * polar data
    * cylindrical/spherical
    * time/date coords

Binary and Image data

    * binary data
    * image data
    * binary and image tricks
    * RGB + alpha channel

Colors

    * user-defined colors
    * RGB coloring
    * pm3d colors
    * pm3d gamma

   
Sample Applications

    * control models
    * discrete contours
    * financial data
    * non-gridded data
    * running averages
    * cummulative smoothing
    * 2D and 3D heat maps

Text options

    * colored text
    * rotated text
    * 'enhanced' text
    * string data
    * string variables

Page Layout

    * plot key
    * multiplot layout
    * multiple plots
    * aligned plots
    * axis tics
    * rectangles

Styles

    * line styles
    * fill styles
    * arrow styles
    * transparency
    * transparent solids

For the Last Mac OS X Binary Gnuplot-4.0.0.dmg           Size: 2.4 MB     Date released: 2004-10-27     
get Gnuplot 4.0.0 here: https://sourceforge.net/projects/gnuplot/files/gnuplot/4.0.0/Gnuplot-4.0.0.dmg/download

http://gnuplot.sourceforge.net/
http://www.ncftp.com/download/ has:
Precompiled binary distributions are also available for your convenience. If you are having problems getting the gnuplot binary from one of these binary distributions to work, you should compile it yourself.
# Gnuplot 4.0.0 for AIX 4.3 (RS/6000)
# Gnuplot 4.0.0 for FreeBSD 5.x (Intel 32-bit)
# Gnuplot 4.0.0 for FreeBSD 6.x (Intel 32-bit)
# Gnuplot 4.0.0 for HP-UX 11 (PA-RISC)
# Gnuplot 4.0.0 for IRIX 6.5
# Gnuplot 4.0.0 for Linux (Intel 32-bit)
# Gnuplot 4.0.0 for Mac OS X 10.4 or 10.5 (Intel 32-bit)
# Gnuplot 4.0.0 for Mac OS X 10.4 or 10.5 (PowerPC)
# Gnuplot 4.0.0 for OpenBSD 3.9 (Intel 32-bit)
# Gnuplot 4.0.0 for Solaris 10 (Intel 32-bit)
# Gnuplot 4.0.0 for Solaris 10 (Sparc)
# Gnuplot 4.0.0 for Solaris 8 (Intel 32-bit)
# Gnuplot 4.0.0 for Solaris 8 (Sparc)
# Gnuplot 4.0.0 for Tru64Unix 5.1 (Alpha)