GNUPLOT(1)						      General Commands Manual							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 command, 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  environ-
       ment 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 terminal" 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 driv-
	      ers.

       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" variable, 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 custom 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 private 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 contributors.

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)