gnuplot - an interactive plotting program
gnuplot [X11 options] [options] [file ...]
Gnuplot is a command-driven interactive plotting program.
If file names are given on the command line, gnuplot loads each file with the load com-
mand, in the order specified, and exits after the last file is processed. If no files are
given, gnuplot prompts for interactive commands.
Here are some of its features:
Plots any number of functions, built up of C operators, C math library functions, and some
things C doesn't have like **, sgn(), etc.
User-defined constants and functions.
All computations performed in the complex domain. Just the real part is plotted by
default, but functions like imag() and abs() and arg() are available to override this.
Many presentation styles for plotting user data from files, including surface-fitting,
error bars, boxplots, histograms, heat maps, and simple manipulation of image data. There
is an on-line demo collection at
Nonlinear least-squares fitting.
2D and 3D plots with mouse-controlled zoom and rotation.
Shell escapes and command line substitution.
Load and save capability.
Support for a huge variety of output devices and file formats.
-p, --persist lets plot windows survive after main gnuplot program exits.
-e "command list" executes the requested commands before loading the next input file.
-h, --help print summary of usage
-V show current version
Gnuplot provides the x11 terminal type for use with X servers. This terminal type is set
automatically at startup if the GNUTERM environment variable is set to x11, or if the
-display command line option is used. For terminal type x11, gnuplot accepts the standard
X Toolkit options and resources such as geometry, font, and background. See the X(1) man
page for a description of common options. For additional X options specific to gnuplot,
type help x11 on the gnuplot command line.
A number of shell environment variables are understood by gnuplot. None of these are
The name of the terminal type to be used by default. This can be overridden by the
gnuplotrc or .gnuplot start-up files and, of course, by later explicit "set termi-
The pathname of the HELP file (gnuplot.gih).
HOME The name of a directory to search for a .gnuplot file.
PAGER An output filter for help messages.
SHELL The program used for the "shell" command.
Specifies a gnuplot command to be executed when a fit is interrupted---see "help
The name of the logfile maintained by fit.
Additional search directories for data and command files. The variable may contain
a single directory name, or a list of directories separated by ':'. The contents of
GNUPLOT_LIB are appended to the "loadpath" variable, but not saved with the "save"
and "save set" commands.
Several gnuplot terminal drivers access TrueType fonts via the gd library. This
variable gives the font search path for these drivers.
The default font for the terminal drivers that access TrueType fonts via the gd
The font search path used by the postscript terminal. The format is the same as for
GNUPLOT_LIB. The contents of GNUPLOT_FONTPATH are appended to the "fontpath" vari-
able, but not saved with the "save" and "save set" commands.
Used by the postscript driver to locate external prologue files. Depending on the
build process, gnuplot contains either a builtin copy of those files or simply a
default hardcoded path. Use this variable to test the postscript terminal with cus-
tom prologue files. See "help postscript prologue".
When gnuplot is run, it first looks for a system-wide initialization file named
gnuplotrc. The standard location of this file expected by the program is reported
by the "show loadpath" command.
After loading the system-wide initialization file, if any, Gnuplot looks for a pri-
vate initialization file in the HOME directory. It may contain any legal gnuplot
commands, but typically they are limited to setting the preferred terminal and line
types and defining frequently-used functions or variables.
The default name of the logfile output by the "fit" command.
Original authors: Thomas Williams and Colin Kelley. Starting with gnuplot version 3.8,
the project source is cooperatively maintained on SourceForge by a large number of con-
Please report bugs using the project bug tracker on SourceForge.
See the printed manual or the on-line help for details on specific commands. Project web
site at http://gnuplot.info
4th Berkeley Distribution 7 September 2012 GNUPLOT(1)