segments {graphics}  R Documentation 
Draw line segments between pairs of points.
segments(x0, y0, x1 = x0, y1 = y0,
col = par("fg"), lty = par("lty"), lwd = par("lwd"),
...)
x0 , y0 
coordinates of points from which to draw. 
x1 , y1 
coordinates of points to which to draw. At least one must be supplied. 
col , lty , lwd 
graphical parameters as in

... 
further graphical parameters (from 
For each i
, a line segment is drawn between the point
(x0[i], y0[i])
and the point (x1[i], y1[i])
. The
coordinate vectors will be recycled to the length of the longest.
The graphical parameters col
, lty
and lwd
can be
vectors of length greater than one and will be recycled if necessary.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
arrows
,
polygon
for slightly easier and less flexible line
drawing, and
lines
for the usual polygons.
x < stats::runif(12); y < stats::rnorm(12)
i < order(x, y); x < x[i]; y < y[i]
plot(x, y, main = "arrows(.) and segments(.)")
## draw arrows from point to point :
s < seq(length(x)1) # one shorter than data
arrows(x[s], y[s], x[s+1], y[s+1], col= 1:3)
s < s[length(s)]
segments(x[s], y[s], x[s+2], y[s+2], col= 'pink')