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How to write text outside plot using ggplot2 in R?
To write text outside plot using ggplot2, we can use annotate function and coord_cartesian function. The annotate function will define the text value and the coord_cartesian function will define the position of the text outside the plot area.
Check out the below example to understand how it works.
Example
Following snippet creates a sample data frame −
x<-rnorm(20) y<-rnorm(20) df<-data.frame(x,y) df
The following dataframe is created −
x y 1 -0.40472483 -0.07760919 2 -0.09077911 0.40705712 3 0.04122442 -0.67552070 4 -0.78520861 -0.24918263 5 -1.38592400 0.67534026 6 -0.68027757 1.06726703 7 -0.73141825 -0.01776461 8 0.09336187 0.27947009 9 0.38625538 -0.34174606 10 -0.18627279 1.00174991 11 -1.68310315 -0.29876124 12 1.33719646 -0.13991965 13 -0.70679075 -0.11464434 14 -1.54770217 2.61299815 15 1.55050758 0.82286414 16 0.30323709 0.58833182 17 0.36705970 -2.12925379 18 0.77242047 -1.54357138 19 1.13557728 0.04046488 20 -0.09440322 -0.94294441
To load ggplot2 package and create point chart between x and y, add the following code to the above snippet −
library(ggplot2) ggplot(df,aes(x,y))+geom_point()
Output
If you execute all the above given snippets as a single program, it generates the following output −
To create point chart between x and y with text outside the plot, add the following code to the above snippet −
ggplot(df,aes(x,y))+geom_point()+annotate("text",x=-1,y=-3.1,label="Scatterplot Display")+coord_cartesian(ylim=c(-2.5,3),clip="off")
Output
If you execute all the above given snippets as a single program, it generates the following output −
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