TITLE(points @@ Add Points to a Plot)
USAGE(
points(x, y, pch="o", DOTS)
points.default(x, y=NULL, pch=1, col="black", DOTS)
)
ALIAS(points)
ALIAS(points.default)
ARGUMENTS(
ARG(x, y @@ coordinate vectors of points to plot.)
ARG(pch @@ plotting 'character', i.e. symbol to use.  LANG(pch) can
either be a LANG(LINK(character)) or an integer code for a set of
graphics symbols.  The full set of S symbols is available with LANG(pch=0:18).
PARA
In addition, there is a special set of R plotting symbols which
can be obtained with LANG(pch=19:25) and can be colored and filled
with different colors:
LANG(pch=19): solid circle,
LANG(pch=20): bullet,
LANG(pch=21): circle,
LANG(pch=22): square,
LANG(pch=23): diamond,
LANG(pch=24): triangle point-up,
LANG(pch=25): triangle point down.
)
ARG(col @@ color to use. )
ARG(DOTS @@ Further graphical parameters (see LANG(LINK(par))) may
also be supplied as arguments.)
)
DESCRIPTION(
LANG(points) is a generic function to draw a sequence of points at the
specified coordinates. 
The specified character(s) are plotted, centered at the coordinates.
PARA
Graphical parameters are permitted as arguments to this function.
)
SEEALSO(
LANG(LINK(plot)), LANG(LINK(lines)).
)	
EXAMPLES(
plot(-4:4, -4:4, type = 'n')# setting up coord. system
points(rnorm(200), rnorm(200), col = 'red')
points(rnorm(100)/2, rnorm(100)/2, col = 'blue', cex = 1.5)
BLANK
## Showing all the graphics symbols
ipch <- 1:25
iy <- 3 + 4-(ipch-1) %% 5
ix <- (ipch-1) %/% 5
plot(ix, iy, type='n', axes = F, xlab = '', ylab = '',
     main = 'plot symbols :  points (..  pch = * )')
abline(v=ix, h=iy, col = "lightgray", lty = "dotted")
for(i in ipch) { # red symbols with a yellow interior (where available)
  points(ix[i],      iy[i], pch=i, col="red", bg="yellow", cex = 15)
  text  (ix[i] - .3, iy[i], i, col="brown", cex = 1.5)
}
)
KEYWORD(aplot)
