On Jun 25, 2009, at 1:30 PM, Lesandro wrote:
Hello all,
How to draw a line in plot when I know the start point(x1,y1) and
end point(x2,y2)? I need make this as additional information in the
graph:
plot(wl2[[1]],wl2[[2]])
I think that is possible make this with the function abline(), is
possible? I looked the function lines() too, but don't understand as
make.
Thanks!
Lesandro
See ?segments which does just what you are looking for.
lines() is more designed for a series of connected lines (eg. a
polygon) rather than a single line segment.
abline() can draw a straight line, at a given vertical or horizontal
position, or if given a linear model object, the fitted line.
HTH,
Marc Schwartz
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