This is a very basic question. I am just wondering if there is a function
where i can choose a vector of points, and them helper lines are drawn.

I am asking because lines seams to be a cumbersome way to do this.

E.g.
x <- 1:36
plot(log(x,1.1),xlab="Number of months", ylab="Visits(1000)",main="webpage
visits")
abline(h=log(12,1.1),col="red",lty=2)
mtext(round(log(12,1.1)),side=2,at=log(12,1.1),las=2,outer=F, col="red")
abline(h=log(24,1.1),col="red",lty=2)
mtext(round(log(24,1.1)),side=2,at=log(24,1.1),las=2,outer=F, col="red")
abline(h=log(36,1.1),col="red",lty=2)
mtext(round(log(36,1.1)),side=2,at=log(36,1.1),las=2,outer=F, col="red")

In this example ablines are easy - but not good because the extend beynd the
points.

What I would like is something like
helper.lines(x=c(12,24,36), lty=2, col="red",text=T)

If "text=True" the lines are annotated with the points corresponding x and y
value.

Is there something that doed this?

Hope my explanation makes sense.

Sincerely.

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