Add Title to Venn Diagram in R (3 Examples)

 

This tutorial demonstrates how to draw a venn diagram with main title in the R programming language.

Since venn diagrams can be created based on many different packages, I have prepared three examples for three different packages.

The post looks as follows:

Let’s get started.

 

Example 1: Add Title to Venn Diagram Created by VennDiagram Package

In Example 1, I’ll illustrate how to draw a venn diagram with titles using the VennDiagram package.

In order to use the functions of the VennDiagram package, we first need to install and load VennDiagram:

install.packages("VennDiagram")     # Install & load VennDiagram package
library("VennDiagram")

In the next step, we can use the draw.pairwise.venn function to draw a pairwise venn diagram. Note that we are also creating a plot object called my_venndiag:

my_venndiag <- draw.pairwise.venn(area1 = 12, # Create venn diagram
                                  area2 = 18,
                                  cross.area = 5)

 

r graph figure 1 venn diagram r programming language

 

In the next step, we have to install and load the gridExtra package:

install.packages("gridExtra")       # Install gridExtra package
library("gridExtra")                # Load gridExtra package

We can now use the functions of the gridExtra package to add titles to our plot. In the following R code, I’m using the top argument to add a main title and the bottom argument to add a subtitle:

grid.arrange(gTree(children = my_venndiag), # Add title & subtitle
             top = "My Main Title",
             bottom = "My subtitle")

 

r graph figure 2 venn diagram r programming language

 

Example 2: Add Title to Venn Diagram Created by ggvenn Package

The following R syntax demonstrates how to add a main title to venn diagrams created by the ggvenn package.

For this, we first have to create an exemplifying data set that we can use later on to create a ggvenn venn diagram:

set.seed(68195)                     # Create example data frame
data_venn <- data.frame(value = 1:50,
                        A = FALSE,
                        B = FALSE)
data_venn$A <- data_venn$value %in% list_venn$A
data_venn$B <- data_venn$value %in% list_venn$B
head(data_venn)                     # Head of example data frame
#   value     A     B
# 1     1  TRUE FALSE
# 2     2  TRUE FALSE
# 3     3  TRUE FALSE
# 4     4 FALSE  TRUE
# 5     5 FALSE FALSE
# 6     6  TRUE  TRUE

Next, we have to install and load the ggvenn add-on package:

install.packages("ggvenn")          # Install ggvenn package
library("ggvenn")                   # Load ggvenn

The ggvenn package works in combination with the ggplot2 package, so let’s install and load the ggplot2 package as well:

install.packages("ggplot2")         # Install ggplot2 package
library("ggplot2")                  # Load ggplot2

In the next step, we can use the ggplot and geom_venn functions to draw a pairwise venn diagram:

ggp <- ggplot(data_venn, # Apply geom_venn function
              aes(A = A, B = B)) +
  geom_venn()
ggp

 

r graph figure 3 venn diagram r programming language

 

Figure 3 visualizes the output of the previous code, a venn diagram without title.

We can now use the typical ggplot2 syntax to add a title on top of our plot:

ggp + # Add title to ggplot2 venn diagram
  ggtitle("My Main Title")

 

r graph figure 4 venn diagram r programming language

 

Example 3: Add Title to Venn Diagram Created by venneuler Package

Another package that can be used to create venn and Euler diagrams is the venneuler package.

We first have to install and load the venneuler add-on package, to be able to use the functions that are contained in the package:

install.packages("venneuler")       # Install venneuler package
library("venneuler")                # Load venneuler

Next, we can use the plot and venneuler functions to create a venn diagram without a main title:

plot(venneuler(c(A = 10,    # Draw pairwise venn diagram
                 B = 75,
                 "A&B" = 4)))

 

r graph figure 5 venn diagram r programming language

 

If we now want to append a title above our graph, we can use the main argument of the plot function:

plot(venneuler(c(A = 10,    # Add title to venn diagram
                 B = 75,
                 "A&B" = 4)),
     main = "My Main Title")

 

r graph figure 6 venn diagram r programming language

 

Video, Further Resources & Summary

I have recently published a video on my YouTube channel, which explains the contents of this tutorial. Please find the video below.

 

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Furthermore, you might read the other tutorials on this website. I have published several tutorials already.

 

To summarize: You have learned in this article how to create a venn diagram with title on top of the plot in the R programming language. If you have additional questions, please let me know in the comments below.

 

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