how do you put text on different lines in ggplot

Question

My df looks like this:

 Product Day Month Total
Web Server, Applicatiion Server, Database Server, Middle Tier Tue 2015年01月01日 10
Web Server, Application Server, Database Server, Middle Tier Wed 2015年01月01日 6
Web Server, Application Server, Database Server, Middle Tier Wed 2015年02月01日 6

I need to create a heat map in ggplot2 where I need to insert Product name as geom_text.

I have this so far:

ggplot(cal, aes(x=Month, y=Day, fill=Total)) +
 geom_tile() +
 scale_fill_gradient2(high="red",mid="green",low="yellow", 
 na.value="white", midpoint=mean(cal$Total, na.rm=T))+scale_x_date(labels = date_format("%b-%Y"), breaks = date_breaks("month"))+
 geom_text(aes(label=Product))

What happens is since there are multiple Product names separated by comma, when I do geom_text (aes(label=Product)), text is written on top of each other.

Is it possible put each Product name on different lines?

• Roland: ggplot2 can't do automatic linebreaks for you. Have you tried adding \n after , in your Product names?
• user1471980: @Roland, I just tried your recommendation inserting \n after the comma in my data frame, still the same. Text are written on top of each other.

Answer 1

Just add "\n" to your "Product" labels wherever you need a line break:

library(ggplot2)
df <- data.frame(
 label=c("bla \n foo", "first line \n second line"),
 x = c(1, 2), y =c(1,2))
ggplot(df, aes(x=x, y=y, label=label)) + geom_text()

enter image description here

• user1471980: I tried this, it seems to be working. But I still see text on top of each other. How else I can enforce each text to be on the new line?
• fabians: position_dodge does not work with geom_text, so I guess you'll have to shorten your labels and/or reduce the fontsize (geom_text(size = 4) or sth like that) to avoid overlap.
• mindlessgreen: Any way to control spacing between the two lines of text?