# Chapter 10. Legends

Like the x- or y-axis, a legend is a guide: it shows people how to map visual (aesthetic) properties back to data values.

# 10.1 Removing the Legend

## Problem

You want to remove the legend from a graph.

## Solution

Use `guides()`, and specify the scale that should have its legend removed (Figure 10-1):

````# Create the base plot (with legend)`
`pg_plot` `<-` `ggplot``(``PlantGrowth``,` `aes``(``x` `=` `group``,` `y` `=` `weight``,` `fill` `=` `group``))` `+`
`geom_boxplot``()`

`pg_plot`

`# Remove the legend for fill`
`pg_plot` `+`
`guides``(``fill` `=` `FALSE``)````

## Discussion

Another way to remove a legend is to set `guide = FALSE` in the scale. This will result in the exact same output as the preceding code:

````# Remove the legend for fill`
`pg_plot` `+`
`scale_fill_discrete``(``guide` `=` `FALSE``)````

Yet another way to remove the legend is to use the theming system. If you have more than one aesthetic mapping with a legend (`color` and `shape`, for example), this will remove legends for all of them:

````pg_plot` `+`
`theme``(``legend.position` `=` `"none"``)````

Sometimes a legend is redundant, or it is supplied in another graph that will be displayed with the current one. In these cases, it can be useful to remove the legend from a graph.

In the example used here, the colors provide the same information that is on the x-axis, so the legend is unnecessary. Notice that with the legend removed, the area used for ...

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