| segments {base} | R Documentation |
Add Line Segments to a Plot
Description
Draw line segments between pairs of points.
Usage
segments(x0, y0, x1, y1,
col = par("fg"), lty = par("lty"), xpd = FALSE)
Arguments
x0, y0 |
coordinates of points from which to draw. |
x1, y1 |
coordinates of points to which to draw. |
length |
length of the edges of the arrow head (in inches). |
angle |
angle from the shaft of the arrow to the edge of the arrow head. |
col, lty, xpd |
usual graphical parameters as in |
Details
For each i, a line segment is drawn between the point (x0[i],
y0[i]) and the point (x1[i],y1[i]).
The graphical parameters col and lty can be used
to specify a color and line texture for the line segments (col
may be a vector).
See Also
arrows,
polygon for slightly easier and less flexible line drawing and
lines for the usual polygons.
Examples
x <- runif(12); y <- 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')