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GNUPLOT(1)									       GNUPLOT(1)

NAME
       gnuplot - an interactive plotting program

SYNOPSIS
       gnuplot [X11 options] [options] [file ...]

DESCRIPTION
       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
       http://gnuplot.info/demo

       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.

OPTIONS
       -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

X11 OPTIONS
       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.

ENVIRONMENT
       A number of shell environment variables are understood by  gnuplot.   None  of  these  are
       required.

       GNUTERM
	      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-
	      nal" commands.

       GNUHELP
	      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.

       FIT_SCRIPT
	      Specifies  a  gnuplot  command to be executed when a fit is interrupted---see "help
	      fit".

       FIT_LOG
	      The name of the logfile maintained by fit.

       GNUPLOT_LIB
	      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.

       GDFONTPATH
	      Several  gnuplot	terminal  drivers access TrueType fonts via the gd library.  This
	      variable gives the font search path for these drivers.

       GNUPLOT_DEFAULT_GDFONT
	      The default font for the terminal drivers that access TrueType  fonts  via  the  gd
	      library.

       GNUPLOT_FONTPATH
	      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.

       GNUPLOT_PS_DIR
	      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".

FILES
       gnuplotrc
	      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.

       .gnuplot
	      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.

       fit.log
	      The default name of the logfile output by the "fit" command.

AUTHORS
       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-
       tributors.

BUGS
       Please report bugs using the project bug tracker on SourceForge.

SEE ALSO
       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)
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