NAME

       gri - scientific graphics language

SYNOPSIS

       gri [ OPTIONS ] [ CommandFile [ optional_arguments ]]

DESCRIPTION

       Gri is a programming language for scientific graphics.  It can make x-y graphs, contour-graphs, and image
       graphs.   In  addition,  Gri  has a full suite of low-level graphical elements and sufficient programming
       capabilities (loops, subroutines, etc) to permit complex customization.

       Gri is not point-click.  In some ways it is analogous to TeX.  Extensive power  rewards  tolerance  of  a
       modest learning curve.

OPTIONS

       If  a command file (CommandFile) is named, commands are read from that file; otherwise they are read from
       the keyboard.  If a command file is named, then a file in which to store the PostScript output  may  also
       be  named;  otherwise  it  is stored in a file named by substituting the .ps extension instead of .gri in
       CommandFile.  If no command file is named, the output is  named  gri-00.ps  (or  gri-01.ps  if  gri-00.ps
       exists, etc).

       There are 3 special forms that do no graphing:

       `gri -creator postscript_file'

              Extracts the Gri commands that created the Gri PostScript file.

       `gri -help' or `gri -h'

              Prints this help message.

       `gri -version' or `gri -v'

              Prints the version number of Gri.

       In normal usage, where drawing is expected, Gri takes these options:

       -batch or -b

              Stops printing of prompts and hints.

       -chatty[N] or -c[N]

              Let gri print info messages

       -debug or -d

              Turns debugging on (sets variable ..debug.. to value 1).

       -warn_offpage

              Warn if any item is drawn far off a 8.5x11 inch page.  (This is the default.)

       -nowarn_offpage

              Don't warn if any item is drawn far off a 8.5x11 inch page

       -directory pathname

              Specifies  the  directory where Gri looks for startup files; otherwise it looks in /opt/gri/lib or
              at whatever directory is defined in configure shellscript, at compile time.

       -directory_default

              Reports directory where gri.cmd should be found, if not supplied by -directory.

       -no_bounding_box

              Make bounding-box be full page.

       -no_expecting

              Prevent warning message if `expecting version .n.'  command is missing.

       -no_startup_message

              Stops printing of startup message.

       -publication or -p

              Sets the builtin variable ..publication.. to 1; normally it is 0.  One  might  use  if  statements
              (`if !..publication..' ...) on drafts.

       -superuser or -s

              Used  only  by  Gri  programmers  (who can check the value with the C function `superuser()'.)  An
              optional value can be supplied without spaces (e.g. `-s2') to set the debugging level.  Flags  are
              listed below; add flags to get several actions at once

              1: print cmdline before/after substituting synonyms

              2: print cmdline before/after substituting rpn expressions

              4: print new commands being defined

              8: print system commands and `open "... | "' commands before

              they are passed to the system

              128: for author's use only

              256: for author's use only

              Note that all flags are equal to 2 raised to an integer power.  Since the flag values are detected
              by a bitwise OR, you can combine flags by adding; thus specifying a flag of 5 yields flags 1 and 4
              together; specifying 15 yields flags 1, 2, 4 and 8.

       -trace or -t

              Makes Gri print out command lines as they are executed.

       -true or -y

              Makes Gri think the answer to all `query's is RETURN.

SEE ALSO

       For more information, please consult online info and html manuals.

       The info manual included in the main gri Debian package is normally accessed by typing

       info gri

       (or from within Emacs' own info).

       There are also reference cards in postscript format.  See /usr/share/doc/gri/*refcard.ps

       The Debian package gri-html-doc provides the html manual, which when installed is then located at

              /usr/share/doc/gri/html/index.html

       or, if you have a web server installed, at

              http://localhost/doc/gri/html/index.html

       The HTML manual is accessible via dwww and dhelp Debian help interfaces.  The html FAQ is located at

              /usr/share/doc/gri/html/FAQ.html

       The  gri-html-doc  package  also includes examples in /usr/share/doc/gri/examples/ which are described in
       the manual, and are included as a quick start primer.

       The gri-pdf-doc package is a PDF version of the manual suitable for printing.

GRI_MERGE AND GRI_UNPAGE COMMANDS

       Two Perl scripts are provided with Gri to manipulate the PostScript output.

       gri_merge is used to merge multiple Gri output files into a single PostScript file.  See gri_merge -h and
       its man page for usage information.

       gri_unpage is used is split a multi-page Gri output file (in which the new page command  was  used)  into
       separate PostScript files, one for each page.

       See their respective man pages.

EMACS SUPPORT

       An emacs mode is provided with Gri.  It is documented in the gri Info or HTML manual.

       The mode is installed automatically in Debian by the elisp file:

       /etc/emacs/site-start.d/50gri-el.el

       The emacs mode itself is gri-mode.el and is installed on Debian as /usr/share/emacs/site-lisp/gri-mode.el

       Byte-compiled  versions  of  this file are produced for every flavour of Emacs that is installed, and are
       located in places like /usr/share/emacs/23.1/site-lisp/gri-el/gri-mode.elc

SEE ALSO

       gri_merge(1), gri_unpage(1)

AUTHOR

       Gri (c) 1991-2010 Dan Kelley <Dan.Kelley@Dal.CA>

       This manual page by Peter S Galbraith <psg@debian.org>.

                                                                                                          GRI(1)