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Unix Version 7 - man page for plot (v7 section 5)

PLOT(5) 			       File Formats Manual				  PLOT(5)

       plot - graphics interface

       Files  of  this	format are produced by routines described in plot(3), and are interpreted
       for various devices by commands described in plot(1).  A graphics  file	is  a  stream  of
       plotting  instructions.	 Each instruction consists of an ASCII letter usually followed by
       bytes of binary information.  The instructions are executed in order.  A point  is  desig-
       nated  by four bytes representing the x and y values; each value is a signed integer.  The
       last designated point in an l, m, n, or p instruction becomes the `current point' for  the
       next instruction.

       Each  of  the  following descriptions begins with the name of the corresponding routine in

       m  move: The next four bytes give a new current point.

       n  cont: Draw a line from the current point to the point given by  the  next  four  bytes.
	  See plot(1).

       p  point: Plot the point given by the next four bytes.

       l  line: Draw a line from the point given by the next four bytes to the point given by the
	  following four bytes.

       t  label: Place the following ASCII string so that its first character falls on	the  cur-
	  rent point.  The string is terminated by a newline.

       a  arc:	The  first four bytes give the center, the next four give the starting point, and
	  the last four give the end point of a circular arc.  The least  significant  coordinate
	  of  the  end	point  is used only to determine the quadrant.	The arc is drawn counter-

       c  circle: The first four bytes give the center of the circle, the next two the radius.

       e  erase: Start another frame of output.

       f  linemod: Take the following string, up to a newline, as the style for  drawing  further
	  lines.  The styles are `dotted,' `solid,' `longdashed,' `shortdashed,' and `dotdashed.'
	  Effective only in plot 4014 and plot ver.

       s  space: The next four bytes give the lower left corner of the plotting area; the follow-
	  ing four give the upper right corner.  The plot will be magnified or reduced to fit the
	  device as closely as possible.

	  Space settings that exactly fill the plotting area with unity scaling appear below  for
	  devices supported by the filters of plot(1).	The upper limit is just outside the plot-
	  ting area.  In every case the plotting area is taken to be square; points  outside  may
	  be displayable on devices whose face isn't square.

	  4014	    space(0, 0, 3120, 3120);
	  ver	    space(0, 0, 2048, 2048);
	  300, 300s space(0, 0, 4096, 4096);
	  450	    space(0, 0, 4096, 4096);

       plot(1), plot(3), graph(1)


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