How to move or position a legend in ggplot2

Question

I\'m trying to create a ggplot2 plot with the legend beneath the plot.

The ggplot2 book says on p 112 \"The position and justification of legends are controlled by t

Answer 1

Just a few updates to these answers while I'm here. As Hadley mentioned, you can move a legend to the bottom with theme(legend.position = "bottom")

Or manually move with it theme(legend.position = c(.2,.85))

If you want the legend to be horizontal, use theme(legend.position = c(.2,.85), legend.direction = "horizontal")