ggplot(data = mpg, mapping = aes(x = displ, y = hwy,color = drv)) +
+ geom_point() +
+ geom_smooth(se = FALSE)
geom_smooth() using method = 'loess' and formula 'y ~ x'
Error in UseMethod("depth") :
no applicable method for 'depth' applied to an object of class "NULL"
