4BSD/usr/man/cat5/plot.5

PLOT(5)             UNIX Programmer's Manual              PLOT(5)



NAME
     plot - graphics interface

DESCRIPTION
     Files of this format are produced by routines described in
     _p_l_o_t(3), and are interpreted for various devices by commands
     described in _p_l_o_t(1).  A graphics file is a stream of plot-
     ting 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 _p_l_o_t(3).

     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 _p_l_o_t(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 current point.  The string is ter-
        minated 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 coordi-
        nate of the end point is used only to determine the qua-
        drant.  The arc is drawn counter-clockwise.

     c  circle: The first four bytes give the center of the cir-
        cle, 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 `dot-
        dashed.' 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 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.



Printed 11/10/80                                                1






PLOT(5)             UNIX Programmer's Manual              PLOT(5)



        Space settings that exactly fill the plotting area with
        unity scaling appear below for devices supported by the
        filters of _p_l_o_t(1).  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 dev-
        ices 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);

SEE ALSO
     plot(1), plot(3), graph(1)









































Printed 11/10/80                                                2