inserting custom text to ggplot2

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?

You should include sample data and include your current graph so that we can recreate your problem and provide a solution. — Idr
– Idr, Commented Aug 16, 2012 at 19:35

Luciano Selzer · Accepted Answer · 2012-08-16 19:39:29Z

23

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)

answered Aug 16, 2012 at 19:39

Luciano Selzer

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3 Comments

user1471980 Over a year ago

this is fine but when I put the x and y values, my graphs go back in date. How do I put x and y values so that my chart does not change?

Luciano Selzer Over a year ago

@user1471980 Well since you provided no data I had to guess, just change the x in annotate to whatever you need.

InesGuardans Over a year ago

Is it possible to use annotate when the plot is empty and thus there are no x and y coordinates to define the placement? I would just want a centered text!

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