Arrange List of ggplot2 Plots in R (Example)

 

On this page you’ll learn how to draw a list of ggplot2 plots side-by-side in the R programming language.

Table of contents:

Let’s take a look at some R codes in action.

 

Example Data, Packages & Basic Graph

The data below is used as basement for this R programming tutorial:

set.seed(47499)                                                               # Create example data
data <- data.frame(x = rnorm(100),
                   y = rnorm(100),
                   group = rep(LETTERS[1:5],
                               times = 20))
head(data)                                                                    # Head of example data
#             x          y group
# 1 -0.91956298 -2.4521731     A
# 2 -0.03343599 -0.6978976     B
# 3 -0.74917821 -0.2750820     C
# 4 -0.30489141 -0.8415968     D
# 5 -0.65035229  1.0372558     E
# 6 -0.28318237 -1.2768368     A

Have a look at the previous output of the RStudio console. It shows that our example data contains three columns – Two numeric variables that will be drawn in the plots later on and a grouping variable defining which value will be drawn in which plot.

For the following tutorial, I also have to install and load the ggplot2 package to R:

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

Now, we can create several ggplot2 plots of the data…

ggp1 <- ggplot(data[data$group == "A", ], aes(x, y), col = 1) + geom_point()  # Create plots
ggp2 <- ggplot(data[data$group == "B", ], aes(x, y), col = 2) + geom_point()
ggp3 <- ggplot(data[data$group == "C", ], aes(x, y), col = 3) + geom_point()
ggp4 <- ggplot(data[data$group == "D", ], aes(x, y), col = 4) + geom_point()
ggp5 <- ggplot(data[data$group == "E", ], aes(x, y), col = 5) + geom_point()

…and store them in a list of plots:

plot_list <- list(ggp1, ggp2, ggp3, ggp4, ggp5)                               # Store plots in list

 

Example: Draw List of Plots Using do.call & grid.arrange Functions

In this Example, I’ll explain how to use the do.call and grid.arrange functions to draw all of our plots side-by-side on the same page. First, we need to install and load the gridExtra package, which is containing the grid.arrange function:

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

Now, we can draw our list of graphics in a grid as shown below:

do.call("grid.arrange", c(plot_list, ncol = 3))                               # Apply do.call & grid.arrange

 

r graph figure 1 arrange list ggplot2 plots

 

The output of the previously shown R syntax is shown in Figure 1: A grid of ggplot2 scatterplots.

 

Video, Further Resources & Summary

Have a look at the following video of my YouTube channel. In the video, I’m showing the R code of this article in R.

 

The YouTube video will be added soon.

 

In addition, you may want to have a look at the related tutorials of this homepage. Some tutorials are shown here.

 

To summarize: In this R tutorial you learned how to position multiple ggplot2 graphs using grid.arrange. Please let me know in the comments section, in case you have additional questions.

 

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