Provided by: gri_2.12.26-1build1_amd64 bug


       gri - scientific graphics language


       gri [ OPTIONS ] [ CommandFile [ optional_arguments ]]


       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.


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


              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.


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


              Make bounding-box be full page.


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


              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.


       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/*

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


       or, if you have a web server installed, at


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


       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.


       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.


       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:


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

       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-


       gri_merge(1), gri_unpage(1)


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

       This manual page by Peter S Galbraith <>.