PLOT(3X)                             BSD                              PLOT(3X)



NAME
     plot: openpl, erase, label, line, circle, arc, move, cont, point,
     linemod, space, closepl - graphics interface

SYNOPSIS
     openpl()

     erase()

     label(s)
     char s[];

     line(x1, y1, x2, y2)

     circle(x, y, r)

     arc(x, y, x0, y0, x1, y1)

     move(x, y)

     cont(x, y)

     point(x, y)

     linemod(s)
     char s[];

     space(x0, y0, x1, y1)

     closepl()

DESCRIPTION
     These subroutines generate graphic output in a relatively device-
     independent manner. See plot(5) for a description of their effect.
     openpl must be used before any of the others to open the device for
     writing.  closepl flushes the output.

     String arguments to label and linemod are null terminated and do not
     contain newlines.

     Various flavors of these functions exist for different output devices.
     They are obtained by the following ld(1) options:

     -lplot         Device-independent graphics stream on standard output for
                    plot(1) filters
     -l300          GSI 300 terminal
     -l300s         GSI 300S terminal
     -l450          GSI 450 terminal
     -l4013         Tektronix 4013 terminal
     -l4014         Tektronix 4014 and 4015 terminals with the Enhanced
                    Graphics Module (Use -l4013 for 4014s or 4015s without the
                    Enhanced Graphics Module)
     -lplotaed      AED 512-color graphics terminal
     -lplotbg       BBN bitgraph graphics terminal
     -lplotdumb     Dumb terminals without cursor addressing or line printers
     -lplot         DEC* Gigi terminals
     -lvt0          DEC VT100* terminals
     -lplot2648     Hewlett Packard 2648 graphics terminal
     -lplot7221     Hewlett Packard 7221 graphics terminal
     -lplotimagen   IMAGEN* laser printer (default 240 dots-per-inch
                    resolution)

     -lgmr          Domain/OS 2D Graphics Metafile Resource (2DGMR) file.

     On many devices, it is necessary to pause after erase(); otherwise,
     plotting commands are lost.  The pause is normally done by the tty driver
     if, at log-in time, tset found a df field in the termcap(5) entry for the
     terminal.  If a pause is needed but not automatically being generated,
     add

          flush(stdout);
          sleep(1);

     after each erase().

SEE ALSO
     plot(5), plot(1G), plot(3F), graph(1G)

NOTES
     *DEC and VT100 are registered trademarks of the Digital Equipment
     Corporation.  IMAGEN is a registered trademark of the IMAGEN Corporation.