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 2015-01-01  10
Web Server, Application Server, Database Server, Middle Tier  Wed 2015-01-01    6
Web Server, Application Server, Database Server, Middle Tier  Wed 2015-02-01    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?

ggplot2 can't do automatic linebreaks for you. Have you tried adding \n after , in your Product names? — Roland
@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. — user1471980

fabians fabians · Accepted Answer · 2015-01-21T17:31:26

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

how do you put text on different lines in ggplot

1 Answers