How to write legends in two rows in ggplot in R?

Question

I am writing legends horizontally on a plot created using ggplot in R. How can I split the legends into two rows?

Answer 1

You can use the guides() function with color/fill as guide_legend() with parameter nrow=2. It will evenly split the legends into two rows.

When you have used the fill parameter of ggplot for the legends, use the following code:

guides(fill=guide_legend(nrow=2, byrow=TRUE))

When you have used the color parameter of ggplot for the legends, use the following code:

guides(color=guide_legend(nrow=2, byrow=TRUE))