# Reorder Facets in ggplot2 Plot in R (Example)

This tutorial illustrates how to fix the ordering of facets in a ggplot2 graph in R.

The content of the tutorial is structured as follows:

Here’s the step-by-step process…

## Example Data, Packages & Basic Graph

Let’s first create some example data in R:

```data <- data.frame(x1 = 1:4, # Create example data x2 = 4:1, group = LETTERS[1:4]) data # Show data in console # x1 x2 group # 1 1 4 A # 2 2 3 B # 3 3 2 C # 4 4 1 D```

As you can see based on the previous output of the RStudio console, our example data has two numeric columns and a grouping variable.

If we want to plot our data with the ggplot2 package, we also have to install and load ggplot2:

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

Next, we can draw a graphic of our data:

```ggp <- ggplot(data, aes(x1, x2)) + # Create facet plot with default order geom_point() + facet_grid(.~group) ggp # Draw facet plot``` Figure 1 shows the output of the previously shown syntax – A facet plot with facets in alphabetical order.

## Example: Reordering Facets of Facet Plot Using relevel Function

In this Example, I’ll illustrate how to adjust the sorting of a ggplot2 facet plot in R. As first step, we have to reorder the levels of our grouping variable using the relevel function:

```data_new <- data # Replicate data data_new\$group <- factor(data_new\$group, # Reordering group factor levels levels = c("B", "A", "C", "D"))```

Now, we can draw our plot again:

```ggp_new <- ggplot(data_new, aes(x1, x2)) + # Create facet plot again geom_point() + facet_grid(.~group) ggp_new # Print new facet plot``` Figure 2 shows the output of the previous R programming syntax – A reordered facet plot created with the ggplot2 add-on package.

## Video & Further Resources

Do you need further information on the examples of this article? Then you could watch the following video that I have published on my YouTube channel. In the video, I’m explaining the contents of this article.

In addition, I can recommend to read the other articles of this website:

Summary: In this tutorial, I illustrated how to reorder facets in a ggplot2 facet plot in the R programming language. If you have further questions, let me know in the comments.

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