# Reverse Order of ggplot2 Plot Legend in R (Example)

In this tutorial youâ€™ll learn how to reverse the ordering of a ggplot2 plot legend in R.

Letâ€™s dive right inâ€¦

## Example Data, Software Packages & Default Graphic

Initially, letâ€™s create some example data:

```data <- data.frame(x = 1:8,        # Create example data
y = c(1, 3, 6, 3, 2, 5, 4, 5),
group = LETTERS[1:4])
data                               # Print example data```

Table 1 shows the structure of our example data â€“ It contains eight rows and three columns. The variable x has the integer class, the variable y is numerical, and the variable group has the character class.

We also have to install and load the ggplot2 package, in order to use the corresponding functions:

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

Now, we can draw our example data as shown below:

```ggp <- ggplot(data,                # Basic ggplot2 plot
aes(x = x,
y = y,
color = group)) +
geom_point(size = 3)
ggp                                # Draw plot```

As shown in Figure 1, the previous code has managed to create a ggplot2 scatterplot. The display order of the legend follows the default settings of the ggplot2 package (i.e. alphabetically sorted).

Letâ€™s change this order!

## Example: Reverse Ordering of ggplot2 Plot Legend Using guides() & guide_legend() Functions

The following syntax explains how to reverse the order of a ggplot2 graphic legend.

For this task, we can apply the guides() and guide_legend() functions as shown below:

```ggp +                              # Reverse legend order
guides(col = guide_legend(reverse = TRUE))```

After executing the previous R programming code the legend of our ggplot2 plot has been reversed, i.e. the legend item D is shown at the top and the legend item A is shown at the bottom of the legend.

## Video, Further Resources & Summary

Have a look at the following video on my YouTube channel. I illustrate the topics of this tutorial in the video:

Furthermore, you may want to read the related tutorials on this homepage:

You have learned in this tutorial how to reverse the value and label order of a ggplot2 graph legend so that the highest value is shown at the top and the lowest value is shown at the bottom in R. Donâ€™t hesitate to kindly let me know in the comments section, if you have further questions.

Subscribe to the Statistics Globe Newsletter