R: how to position legends horizontally in ggplot

Question

In the plot created using ggplot, the legends are vertical. I want to position them horizontally. How to do it?

Answer 1

You can use the theme() with the argument "legend.direction" to change the position of legends.

The following example positions the legends horizontally.

plt <- ggplot(df, aes(x=x, y=y,...)) +

theme(legend.direction="horizontal")