PLOT(F)                              UNIX System V



     Name
          plot - graphics interface


     Description
          Files of this format are produced by routines  described  in
          plot(S)  and are interpreted for various devices by commands
          described in tplot(ADM).  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, 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 plot(S).

          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 tplot(ADM)].

          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 new-line.

          e  erase:  Start another frame of output.

          f  linemod:  Take the following string, up to a new-line, as
             the  style  for  drawing  further  lines.  The styles are
             ``dotted'', ``solid'',  ``longdashed'',  ``shortdashed'',
             and  ``dotdashed''.   Effective  only  for the -T4014 and
             -Tver options of tplot(ADM) (TEKTRONIX 4014 terminal  and
             VERSATEC plotter).

          s  space:  The next four bytes give the lower left corner of
             the  plotting  area;  the  following  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 tplot(ADM).  The upper limit is just outside  the
          plotting  area.  In every case the plotting area is taken to
          be square; points outside  may  be  displayable  on  devices
          whose face is not square.

               DASI 300
                                 space(0, 0, 4096, 4096);
               DASI 300s
                                 space(0, 0, 4096, 4096);
               DASI 450
                                 space(0, 0, 4096, 4096);
               TEKTRONIX 4014    space(0, 0, 3120, 3120);
               VERSATEC plotter  space(0, 0, 2048, 2048);


     See Also
          plot(S), term(M), graph(ADM), tplot(ADM)


     Notes
          The  plotting  library  plot(S)  and  the   curses   library
          curses(S) both use the names erase() and move().  The curses
          versions are macros.  If you need both  libraries,  put  the
          plot(S)  code  in a different source file than the curses(S)
          code, and/or #undef move() and erase() in the plot(S) code.


     (printed 2/15/90)                                    PLOT(F)