Question

I have a ggplot graph that I would like to insert custom string below 0 as “Within” and above 0 as “Breached”.

I am doing this:

ggplot(z, aes(Date, Breach1/60, group=Jobs, label=c("Within SLA", "Breached SLA"))) + 
 geom_line(size=1) + 
 theme_bw() + ylab("Hours") + xlab("Date") + opts(title="Jobs") + 
 geom_hline(yintercept=0, color="red", size=2) + geom_text(hjust=0, vjust=3)

This seems to put text all over the place. I like to put one text above the zero and one text below the zero value. Any ideas?

Answer 1

You are after annotate:

ggplot(z, aes(Date, Breach1/60, group=Jobs)) + 
 geom_line(size=1) + 
 theme_bw() + ylab("Hours") + xlab("Date") + opts(title="Jobs") + 
 geom_hline(yintercept=0, color="red", size=2) + 
 annotate("text", label = "Within SLA", x = 1, y = 2) +
 annotate("text", label = "Breached", x = 1, y = -2)