5.8 Coordinate Systems

coord_flipswaps the x and y axis, useful when you have long labels

ggplot(data = mpg, mapping = aes(x = class, y = hwy)) + geom_boxplot()

ggplot(data = mpg, mapping = aes(x = class, y = hwy)) + geom_boxplot() + coord_flip()

coord_quickmap, sets aspect ratio for maps

usa <- ggplot2::map_data('usa')

ggplot(usa, aes(long, lat, group = group)) + geom_polygon(fill = 'white', color = 'black')

ggplot(usa, aes(long, lat, group = group)) + geom_polygon(fill = 'white', color = 'black') + coord_quickmap()

corrd_polar, uses polar coordinates

bar <- ggplot(data = diamonds) +
  geom_bar(mapping = aes(x = cut, fill = cut), show.legend = FALSE, width = 1) +
  theme(aspect.ratio = 1) +
  labs(x = NULL, y = NULL)

bar + coord_flip()

bar + coord_polar()