Syntax error How to write plot description outside plot in facetted plot using ggplot2 in R?

How to write plot description outside plot in facetted plot using ggplot2 in R?

To write plot description outside plot using ggplot2, we can use annotate function and coord_cartesian function. The annotate function will define the plot description and the coord_cartesian function will define the position of the text outside the plot area.

Check out the below given example to understand how it works.

Example

Following snippet creates a sample data frame −

x<-rnorm(20)
y<-rnorm(20)
grp<-sample(LETTERS[1:4],20,replace=TRUE)
df<-data.frame(x,y,grp)
df

The following dataframe is created −

      x            y         grp
1   0.78077456  -1.46198018  D
2  -0.49452689   1.72471204  D
3  -1.39619653  -0.64859852  C
4  -0.73260404   0.79430612  A
5   0.83483420  -0.12772415  D
6  -1.42229860  -0.09636467  C
7   0.02591011   2.35094791  C
8   0.02007910  -0.64553958  D
9   0.78893141   0.89014539  B
10  0.28600357  -0.37031710  C
11 -1.69337019  -0.31425710  D
12  2.08396139  -1.14526981  D
13  0.74312431  -0.68121481  C
14  1.33009148   0.61906318  B
15  0.75865211   0.10783624  C
16 -0.82221628  -0.32764999  B
17 -0.28765766  -2.32935412  D
18 -1.30783428   0.48349510  B
19  2.32201111  -0.25456548  D
20 -1.50377138  -1.37306174  D

To load ggplot2 package and create facetted scatterplot between x and y with plot description outside the plot area, add the following code to the above snippet −

library(ggplot2) ggplot(df,aes(x,y))+geom_point()+facet_grid(.~grp)+labs(tag="Groupwise Scatterplot")+coord_cartesian(xlim=c(-3,3),ylim=c(-3,3),clip = "off")

Output

If you execute all the above given snippets as a single program, it generates the following output −

Updated on: 2021-11-22T08:14:29+05:30

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