# 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:

Hereâ€™s the step-by-step processâ€¦

## Example Data, Packages & Basic Graph

Letâ€™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

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 â€“ A facet plot with facets in alphabetical order.

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

In this Example, Iâ€™ll illustrate how to adjust the sorting of a ggplot2 facet plot in R. As a 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 â€“ 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, Iâ€™m explaining the contents of this article.

In addition, I can recommend reading 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.

In this tutorial, we have used the facet_plot function. However, please note that it would be possible to use a similar R syntax when using the related facet_wrap function.

If you have further questions, let me know in the comments.

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