plot.xy               package:graphics               R Documentation

Basic Internal Plot Function

Description:

     This is _the_ internal function that does the basic plotting of
     points and lines.  Usually, one should rather use the higher level
     functions instead and refer to their help pages for explanation of
     the arguments.

Usage:

     plot.xy(xy, type, pch = par("pch"), lty = par("lty"),
             col = par("col"), bg = NA,
             cex = 1, lwd = par("lwd"), ...)

Arguments:

      xy: A four-element list as results from 'xy.coords'.

    type: 1 character code: see 'plot.default'. 'NULL' is accepted as a
          synonym for '"p"'.

     pch: character or integer code for kind of points, see
          'points.default'.

     lty: line type code, see 'lines'.

     col: color code or name, see 'colors', 'palette'.  Here 'NULL'
          means colour 0.

      bg: background (fill) color for the open plot symbols 21:25: see
          'points.default'.

     cex: character expansion.

     lwd: line width, also used for (non-filled) plot symbols, see
          'lines' and 'points'.

     ...: further graphical parameters such as 'xpd', 'lend', 'ljoin'
          and 'lmitre'.

Details:

     The arguments 'pch, col, bg, cex, lwd' may be vectors and may be
     recycled, depending on 'type': see 'points' and 'lines' for
     specifics.  In particular note that 'lwd' is treated as a vector
     for points and as a single (first) value for lines.

     'cex' is a numeric factor in addition to 'par("cex")' which
     affects symbols and characters as drawn by 'type' '"p"', '"o"',
     '"b"' and '"c"'.

See Also:

     'plot', 'plot.default', 'points', 'lines'.

Examples:

     points.default # to see how it calls "plot.xy(xy.coords(x, y), ...)"

