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PLOT(1)			    GNU	Plotting Utilities		       PLOT(1)

NAME
       plot - translate	GNU metafiles to other graphics	formats

SYNOPSIS
       plot [ options ]	[ files	]

DESCRIPTION
       plot translates files in	GNU metafile format to other graphics formats,
       or displays them	on an X	Window System display.	GNU metafile format is
       a device-independent format for the storage of graphic data.  It	is the
       default	output	format	of   the   programs   graph(1),	  pic2plot(1),
       tek2plot(1),  and  plotfont(1),	and  is	further	documented in plot(5),
       since it	is an enhanced version of the traditional plot(5) format found
       on  non-GNU  systems.   It  can also be produced	by the GNU libplot 2-D
       graphics	export library (see plot(3)).

       The output format is specified with the -T option.  The possible	output
       formats	and display types are the same as those	supported by graph(1),
       plotfont(1), pic2plot(1), and tek2plot(1).  If an output	file  is  pro-
       duced, it is written to standard	output.

       Options and file	names may be interspersed on the command line, but the
       options are processed before the	file names are read.  If --  is	 seen,
       it  is  interpreted  as	the  end of the	options.  If no	file names are
       specified, or the file name - is	encountered,  the  standard  input  is
       read.

OPTIONS
   General Options
       -T type
       --output-format type
	      Select  type as the output format.  It may be "X", "png",	"pnm",
	      "gif", "svg", "ai", "ps",	"cgm", "fig", "pcl", "hpgl",  "regis",
	      "tek", or	"meta" (the default).  These refer respectively	to the
	      X	Window System, PNG (Portable Network Graphics) format,	porta-
	      ble  anymap  format (PBM/PGM/PPM), a pseudo-GIF format that does
	      not use LZW encoding, the	new XML-based Scalable Vector Graphics
	      format,  the format used by Adobe	Illustrator, Postscript	or En-
	      capsulated Postscript (EPS) that can be  edited  with  idraw(1),
	      CGM  format  (by default,	confirming to the WebCGM profile), the
	      format used by the xfig(1) drawing editor,  the  Hewlett-Packard
	      PCL  5  printer language,	the Hewlett-Packard Graphics Language,
	      ReGIS graphics format (which can be displayed by	the  dxterm(1)
	      terminal	emulator  or  by a VT330 or VT340 terminal), Tektronix
	      format (which can	be displayed by	the xterm(1)  terminal	emula-
	      tor), and	device-independent GNU metafile	format itself.	Unless
	      type is "X", an output file is produced and written to  standard
	      output.

	      Omitting	the  -T	 option	 is  equivalent	to specifying -T meta.
	      Translating from metafile	format to itself is occasionally  use-
	      ful, since there are two versions	of metafile format (see	the -O
	      option below).

	      A	listing	of the fonts available in any specified	output	format
	      may  be obtained with the	--help-fonts option (see below).  If a
	      requested	font is	unavailable, a default font  will  be  substi-
	      tuted.   The  default  font is "Helvetica" for "X", "svg", "ai",
	      "ps", "cgm", and "fig", "Univers"	for "pcl", and	"HersheySerif"
	      for "png", "pnm",	"gif", "hpgl", "regis",	"tek", and "meta".

       -p n
       --page-number n
	      Output  only  page  number n, within the metafile	or sequence of
	      metafiles	that is	being translated.

	      Metafiles	may consist of one or more pages,  numbered  beginning
	      with 1.  Also, each page may contain multiple `frames'.  plot -T
	      X, plot -T regis,	and plot -T tek, which plot in real time, will
	      separate	successive  frames  by	screen erasures.  plot -T png,
	      plot -T pnm, plot	-T gif,	plot -T	svg, plot -T ai, plot  -T  ps,
	      plot  -T	cgm, plot -T fig, plot -T pcl, and plot	-T hpgl, which
	      do not plot in real time,	will output only the last frame	of any
	      multi-frame page.

	      The default behavior, if -p is not used, is to output all	pages.
	      For example, plot	-T X displays each page	in its own  X  window.
	      If  the -T png, -T pnm, -T gif, -T ai, or	-T fig option is used,
	      the default behavior is to output	only the first nonempty	 page,
	      since  files  in those output formats contain only a single page
	      of graphics.

	      Metafiles	produced by graph(1) and plotfont(1)  contain  only  a
	      single  page  (page  #1),	which consists of two frames: an empty
	      frame to clear the display, and a	second frame that contains the
	      graphics.

       -s
       --merge-pages
	      Merge all	displayed pages	into a single page, and	also merge all
	      `frames'.

	      This option is useful when merging  together  single-page	 plots
	      from  different  sources.	  For example, it can be used to merge
	      together plots obtained from separate invocations	of graph(1).

       --bitmap-size bitmap_size
	      Set the size of the graphics display in which the	plot  will  be
	      drawn,  in  terms	 of pixels, to be bitmap_size.	The default is
	      "570x570".  This is relevant only	to plot	-T  X,	plot  -T  png,
	      plot  -T pnm, and	plot -T	gif, all of which produce bitmaps.  If
	      you choose a rectangular (non-square) window size, the fonts  in
	      the plot will be scaled anisotropically, i.e., by	different fac-
	      tors in the horizontal and vertical directions.  For plot	-T  X,
	      this  requires an	X11R6 display.	Any font that cannot be	scaled
	      in this way will be replaced by a	default	scalable font, such as
	      the vector font "HersheySerif".

	      The  environment variable	BITMAPSIZE can equally well be used to
	      specify the window size.	For backward compatibility, the	X  re-
	      source Xplot.geometry may	be used	instead.

       --emulate-color option
	      If  option is yes, replace each color in the output by an	appro-
	      priate shade of gray.  This is seldom useful, except when	 using
	      plot  -T	pcl to prepare output for a PCL	5 device.  (Many mono-
	      chrome PCL 5 devices, such as monochrome LaserJets,  do  a  poor
	      job  of emulating	color on their own.)  You may equally well re-
	      quest color emulation by setting the environment	variable  EMU-
	      LATE_COLOR to "yes".

       --max-line-length max_line_length
	      Set  the maximum number of points	that a polygonal line may con-
	      tain, before it is flushed out, to be max_line_length.  If  this
	      flushing	occurs,	 the  polygonal	line will be split into	two or
	      more sub-lines, though the splitting should not  be  noticeable.
	      The default value	of max_line_length is 500.

	      The  reason for splitting	long polygonal lines is	that some dis-
	      play devices (e.g., old Postscript printers and pen HP-GL	 plot-
	      ters)  have  limited  buffer  sizes.   The  environment variable
	      MAX_LINE_LENGTH can also be used to  specify  the	 maximum  line
	      length.

       --page-size pagesize
	      Set  the	size of	the page on which the plot will	be positioned.
	      This is relevant only to plot -T svg, plot -T ai,	 plot  -T  ps,
	      plot  -T	cgm,  plot -T fig, plot	-T pcl,	and plot -T hpgl.  The
	      default is "letter", which means an 8.5 inch by  11  inch	 page.
	      Any  ISO page size in the	range "a0"..."a4" or ANSI page size in
	      the range	"a"..."e" may be specified ("letter" is	an  alias  for
	      "a"  and	"tabloid"  is an alias for "b").  "legal" and "ledger"
	      are recognized page sizes	also.  The environment variable	 PAGE-
	      SIZE can equally well be used to specify the page	size.

	      The  graphics  display  in  which	the plot is drawn will,	by de-
	      fault, be	a square region	that occupies nearly the full width of
	      the  specified  page.  An	alternative size for the graphics dis-
	      play can be specified.  For example,  the	 page  size  could  be
	      specified	       as	"letter,xsize=4in,ysize=6in",	    or
	      "a4,xsize=5.0cm,ysize=100mm".  For all of	the above except  plot
	      -T  hpgl,	 the graphics display will, by default,	be centered on
	      the page.	 For all of the	above except plot -T svg and  plot  -T
	      cgm, the graphics	display	may be repositioned manually, by spec-
	      ifying the location of its lower left corner,  relative  to  the
	      lower left corner	of the page.  For example, the page size could
	      be specified as "letter,xorigin=2in,yorigin=3in",	 or  "a4,xori-
	      gin=0.5cm,yorigin=0.5cm".	  It  is  also	possible to specify an
	      offset vector.  For example, the page size could be specified as
	      "letter,xoffset=1in",  or	"letter,xoffset=1in,yoffset=1.2in", or
	      "a4,yoffset=-1cm".  In SVG format	and WebCGM format it is	possi-
	      ble to specify the size of the graphics display, but not its po-
	      sition.

       --rotation angle
	      Rotate the graphics display by angle degrees.  Recognized	values
	      are  "0",	"90", "180", and "270".	 "no" and "yes"	are equivalent
	      to "0" and "90", respectively.  The environment  variable	 ROTA-
	      TION can also be used to specify a rotation angle.

   Parameter Initialization Options
       The  following  options	set  the initial values	of drawing parameters.
       However,	all of these may be overridden by directives  in  a  metafile.
       In fact,	these options are useful primarily when	plotting old metafiles
       in the traditional (pre-GNU) plot(5) format, which did not support such
       directives.

       --bg-color name
	      Set  the	color  initially  used	for the	background to be name.
	      This is relevant only to plot -T X, plot -T png,	plot  -T  pnm,
	      plot  -T	gif,  plot -T svg, plot	-T cgm,	and plot -T regis.  An
	      unrecognized name	sets  the  color  to  the  default,  which  is
	      "white".	 The environment variable BG_COLOR can equally well be
	      used to specify the background color.

	      If the -T	png or -T gif option is	used, a	transparent  PNG  file
	      or  a  transparent  pseudo-GIF, respectively, may	be produced by
	      setting the TRANSPARENT_COLOR environment	variable to  the  name
	      of  the  background  color.   If	the -T svg or -T cgm option is
	      used, an output file without a background	 may  be  produced  by
	      setting the background color to "none".

       -f size
       --font-size size
	      Set the size of the font initially used for rendering text, as a
	      fraction of the width of the graphics display, to	be size.   The
	      default is 0.0525.

       -F name
       --font-name name
	      Set the font initially used for text to be name.	Font names are
	      case-insensitive.	 If the	specified font is not  available,  the
	      default  font  will be used.  Which fonts	are available, and the
	      default font, depend  on	which  -T  option  is  specified  (see
	      above).	A  list	 of  available	fonts can be obtained with the
	      --help-fonts option (see below).

       -W line_width
       --line-width line_width
	      Set the initial width of lines, as a fraction of	the  width  of
	      the  display,  to	 be line_width.	 A negative value means	that a
	      default value should be used.  This value	 is  format-dependent.
	      The  interpretation  of zero line	width is also format-dependent
	      (in some output formats, a zero-width line is the	thinnest  line
	      that can be drawn; in others, a zero-width line is invisible).

       --pen-color name
	      Set the initial pen color	to be name.  An	unrecognized name sets
	      the pen color to the default, which is "black".

   Options for Metafile	Output
       The following option is relevant	only if	the -T option is omitted or if
       -T meta is used.	 In this case the output of plot, like the input, will
       be in GNU graphics metafile format.

       -O
       --portable-output
	      Output the portable (human-readable)  version  of	 GNU  metafile
	      format,  rather than the binary version (the default).  The for-
	      mat of the binary	version	is machine-dependent.

   Options for Backward	Compatibility
       By default, plot	assumes	that its input file(s) are in either  the  bi-
       nary  version  or the portable version of GNU metafile format.  You may
       specify that the	input is, instead, in the traditional  Unix  (pre-GNU)
       graphics	 metafile  format, which is documented in plot(5).  The	tradi-
       tional graphics metafile	format was produced  by	 pre-GNU  versions  of
       graph(1).

       -h
       --high-byte-first-input
	      Input file(s) are	assumed	to be in the binary, `high byte	first'
	      version of traditional metafile format.  This variant is	uncom-
	      mon.

       -l
       --low-byte-first-input
	      Input  file(s) are assumed to be in the binary, `low byte	first'
	      version of traditional metafile format.	This  variant  is  the
	      most common.

       -A
       --ascii-input
	      Input  file(s)  are  assumed to be in the	ASCII (human-readable)
	      variant of traditional metafile format.  On some older Unix sys-
	      tems, this variant was produced by plottoa(1).

   Informational Options
       --help Print a list of command-line options, and	exit.

       --help-fonts
	      Print  a table of	available fonts, and exit.  The	table will de-
	      pend on which output format is specified	with  the  -T  option.
	      plot -T X, plot -T svg, plot -T ai, plot -T ps, plot -T cgm, and
	      plot -T fig each support the 35 standard Postscript fonts.  plot
	      -T  svg,	plot  -T pcl, and plot -T hpgl support the 45 standard
	      PCL  5  fonts,  and  the	latter	two  support   a   number   of
	      Hewlett-Packard  vector  fonts.	All  seven support a set of 22
	      Hershey vector fonts, as do plot -T png, plot -T	pnm,  plot  -T
	      gif,  plot  -T regis, and	plot -T	tek.  plot without a -T	option
	      in principle supports any	of these fonts,	since its output  must
	      be translated to other formats by	a further invocation of	plot.

	      The plotfont(1) utility may be used to obtain a character	map of
	      any supported font.

       --list-fonts
	      Like --help-fonts, but lists the fonts in	a single column	to fa-
	      cilitate piping to other programs.  If no	output format is spec-
	      ified with the -T	option,	the full set  of  supported  fonts  is
	      listed.

       --version
	      Print  the  version  number  of  plot and	the plotting utilities
	      package, and exit.

ENVIRONMENT
       The  environment	 variables  BITMAPSIZE,	  PAGESIZE,   BG_COLOR,	  EMU-
       LATE_COLOR,  MAX_LINE_LENGTH  and ROTATION serve	as backups for the op-
       tions   --bitmap-size,	--page-size,   --bg-color,    --emulate-color,
       --max-line-length,  and	--rotation, respectively.  The remaining envi-
       ronment variables are specific to individual output formats.

       plot -T X, which	pops up	a window on an X  Window  System  display  and
       draws  graphics	in  it,	 checks	the DISPLAY environment	variable.  Its
       value determines	the display that will be used.

       plot -T png and plot -T gif, which produce output  in  PNG  format  and
       pseudo-GIF  format respectively,	are affected by	the INTERLACE environ-
       ment variable.  If its value is "yes", the output will  be  interlaced.
       Also,  if the TRANSPARENT_COLOR environment variable is set to the name
       of a color, that	color will be treated as transparent in	the output.

       plot -T pnm, which produces output  in  portable	 anymap	 (PBM/PGM/PPM)
       format,	is  affected by	the PNM_PORTABLE environment variable.	If its
       value is	"yes", the output will be in a	human-readable	format	rather
       than binary (the	default).

       plot  -T	cgm, which produces output in CGM (Computer Graphics Metafile)
       format, is affected by the CGM_MAX_VERSION and CGM_ENCODING environment
       variables.   By	default,  it  produces a binary-encoded	version	of CGM
       version 3 format.  For backward compatibility, the version  number  may
       be  reduced  by setting CGM_MAX_VERSION to "2" or "1".  Irrespective of
       version,	the output CGM file will use the human-readable	clear text en-
       coding  if  CGM_ENCODING	is set to "clear_text".	 However, only binary-
       encoded CGM files conform to the	WebCGM profile.

       plot -T pcl, which produces PCL 5 output	for  Hewlett-Packard  printers
       and  plotters,  is affected by the environment variable PCL_ASSIGN_COL-
       ORS.  It	should be set to "yes" when producing PCL 5 output for a color
       printer	or other color device.	This will ensure accurate color	repro-
       duction by giving the output device complete freedom in assigning  col-
       ors,  internally, to its	"logical pens".	 If it is "no" then the	device
       will use	a fixed	set of colored pens, and will emulate other colors  by
       shading.	  The  default is "no" because monochrome PCL 5	devices, which
       are much	more common than colored ones, must  use  shading  to  emulate
       color.

       plot  -T	hpgl, which produces Hewlett-Packard Graphics Language output,
       is affected by several environment variables.  The  most	 important  is
       HPGL_VERSION,  which  may  be  set to "1", "1.5", or "2"	(the default).
       "1" means that the output should	be generic HP-GL, "1.5"	means that the
       output  should  be  suitable  for  the HP7550A graphics plotter and the
       HP758x, HP7595A and HP7596A drafting plotters (HP-GL with some  HP-GL/2
       extensions),  and  "2"  means that the output should be modern HP-GL/2.
       If the version is "1" or	"1.5" then the only available  fonts  will  be
       vector  fonts, and all lines will be drawn with a default width (the -W
       option will not work).  Additionally, if	the version is	"1"  then  the
       filling	of  arbitrary  curves  with  solid color will not be supported
       (circles	and rectangles aligned with the	coordinate axes	may be filled,
       though).

       The  position  of  the plot -T hpgl graphics display on the page	can be
       rotated 90 degrees counterclockwise by setting the HPGL_ROTATE environ-
       ment  variable to "yes".	 This is not the same as the rotation obtained
       with the	--rotation option, since it both rotates the graphics  display
       and  repositions	 its  lower  left  corner toward another corner	of the
       page.  Besides "no" and "yes", recognized values	 for  HPGL_ROTATE  are
       "0",  "90", "180", and "270".  "no" and "yes" are equivalent to "0" and
       "90", respectively.  "180" and "270" are	supported only if HPGL_VERSION
       is "2" (the default).

       By  default,  plot  -T  hpgl will draw with a fixed set of pens.	 Which
       pens are	present	may be specified by setting the	HPGL_PENS  environment
       variable.   If  HPGL_VERSION  is	"1", the default value of HPGL_PENS is
       "1=black"; if HPGL_VERSION is  "1.5"  or	 "2",  the  default  value  of
       HPGL_PENS  is "1=black:2=red:3=green:4=yellow:5=blue:6=magenta:7=cyan".
       The format should be self-explanatory.  By setting  HPGL_PENS  you  may
       specify	a  color  for  any pen in the range #1...#31.  All color names
       recognized by the X Window System may be	used.  Pen #1 must  always  be
       present,	 though	 it  need  not	be  black.  Any	other pen in the range
       #1...#31	may be omitted.

       If HPGL_VERSION is "2" then plot	-T hpgl	will also be affected  by  the
       environment  variable  HPGL_ASSIGN_COLORS.  If its value	is "yes", then
       plot -T hpgl will  not  be  restricted  to  the	palette	 specified  in
       HPGL_PENS:  it  will  assign  colors  to	 "logical  pens"  in the range
       #1...#31, as needed.  The default value	is  "no"  because  other  than
       color  LaserJet	printers  and DesignJet	plotters, not many HP-GL/2 de-
       vices allow the assignment of colors to logical pens.

       Opaque filling and the drawing of visible  white	 lines	are  supported
       only   if   HPGL_VERSION	  is   "2"   and   the	 environment  variable
       HPGL_OPAQUE_MODE	is "yes" (the default).	 If its	 value	is  "no"  then
       white lines (if any), which are normally	drawn with pen #0, will	not be
       drawn.  This feature is to accommodate older HP-GL/2 devices.   HP-GL/2
       pen  plotters, for example, do not support opacity or the use of	pen #0
       to draw visible white lines.  Some older	HP-GL/2	devices	may, in	 fact,
       malfunction if asked to draw opaque objects.

       plot  -T	 tek, which produces output for	a Tektronix terminal or	emula-
       tor, checks the TERM environment	variable.  If the value	of TERM	 is  a
       string  beginning  with "xterm",	"nxterm", or "kterm", it is taken as a
       sign that plot is running in an X Window	System VT100  terminal	emula-
       tor: a copy of xterm(1),	nxterm(1), or kterm(1).	 Before	drawing	graph-
       ics, plot -T tek	will emit an escape sequence that causes the  terminal
       emulator's auxiliary Tektronix window, which is normally	hidden,	to pop
       up.  After the graphics are drawn, an escape sequence that returns con-
       trol  to	the original VT100 window will be emitted.  The	Tektronix win-
       dow will	remain on the screen.

       If the value of TERM is a string	beginning with	"kermit",  "ansi.sys",
       or "nansi.sys", it is taken as a	sign that plot is running in the VT100
       terminal	emulator provided by the MS-DOS	version	of kermit(1).	Before
       drawing	graphics,  plot	 -T  tek  will	emit  an  escape sequence that
       switches	the terminal emulator to Tektronix mode.  Also,	 some  of  the
       Tektronix control codes emitted by plot -T tek will be kermit-specific.
       There will be a limited amount of color support,	which is not  normally
       the  case  (the 16 `ansi.sys' colors will be supported).	 After drawing
       graphics, plot -T tek will emit an escape sequence that returns the em-
       ulator  to  VT100  mode.	  The key sequence `ALT	minus' can be employed
       manually	within kermit to switch	between	the two	modes.

SEE ALSO
       graph(1), pic2plot(1), tek2plot(1), plotfont(1),	plot(3), plot(5),  and
       "The GNU	Plotting Utilities Manual".

AUTHORS
       plot was	written	by Robert S. Maier (rsm@math.arizona.edu).

BUGS
       Email bug reports to bug-gnu-utils@gnu.org.

FSF				   Jun 2000			       PLOT(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | SEE ALSO | AUTHORS | BUGS

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