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 and executes each file 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 zooming, rotation, and hypertext.

       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.

       -c  scriptname ARG1 ARG2 ..., load script using gnuplot's "call" mechanism and pass it the
       remainder of the command line as arguments

       -d, --default settings.  Do not read from gnuplotrc or ~/.gnuplot on entry.

       -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

       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. These options have no effect on other terminal types.

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 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"
              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