position_nudge is generally useful for adjusting the position of
items on discrete scales by a small amount. Nudging is built in to
geom_text() because it's so useful for moving labels a small
distance from what they're labelling.
position_nudge(x = 0, y = 0)
Amount of vertical and horizontal distance to move.
df <- data.frame( x = c(1,3,2,5), y = c("a","c","d","c") ) ggplot(df, aes(x, y)) + geom_point() + geom_text(aes(label = y))ggplot(df, aes(x, y)) + geom_point() + geom_text(aes(label = y), position = position_nudge(y = -0.1))