PLOT(5)                                                                PLOT(5)



NAME
       plot - graphics interface

DESCRIPTION
       Files of this format are produced by routines described in _p_l_o_t(3X) and
       _p_l_o_t(3F), and are interpreted for various devices by commands described
       in  _p_l_o_t(1G).   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 designated by four bytes representing the x and y values; each
       value is a signed integer.  The last designated point in an l, m, n, a,
       or p instruction becomes the ‘current point’ for the next  instruction.
       The a and c instructions change the current point in a manner dependent
       upon the specific device.

       Each of the following descriptions begins with the name of  the  corre‐
       sponding routine in _p_l_o_t(3X).

       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.

       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 current 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-clockwise.

       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,’ ‘long‐
          dashed,’  ‘shortdashed,’  and  ‘dotdashed.’   Effective only in _p_l_o_t
          _4_0_1_4 and _p_l_o_t _v_e_r_.

       s  space: The next four bytes give the lower left corner of  the  plot‐
          ting area; the following four give the upper right corner.  The plot
          will be magnified or reduced to fit the device as closely as  possi‐
          ble.

          Space  settings that exactly fill the plotting area with unity scal‐
          ing appear below for devices supported by the filters  of  _p_l_o_t(1G).
          The  upper  limit  is just outside the plotting area.  In every case
          the plotting area is taken to be square; points outside may be  dis‐
          playable on devices whose face isn’t square.

          4013      space(0, 0, 780, 780);
          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);

SEE ALSO
       plot(1G), plot(3X), plot(3F), graph(1G)



7th Edition                      May 15, 1985                          PLOT(5)