I am Learning R with the book R for Data Science 2017 - H.Wickham G.Grolemund I have a problem in the page 16 42/520. This is the code:
ggplot(data = mpg)
geom_smooth(mapping = aes(x = displ, y = hwy))
ggplot(data = mpg)
geom_smooth(mapping = aes(x = displ, y = hwy, group = drv))
ggplot(data = mpg)
geom_smooth(
mapping = aes(x = displ, y = hwy, color = drv),
show.legend = FALSE
)
with this plot:
This is the text reference:
Many geoms, like geom_smooth(), use a single geometric object to display multiple rows of data. For these geoms, you can set the group aesthetic to a categorical variable to draw multiple objects. ggplot2 will draw a separate object for each unique value of the grouping variable. In practice, ggplot2 will automatically group the data for these geoms whenever you map an aesthetic to a discrete variable (as in the linetype example). It is convenient to rely on this feature because the group aesthetic by itself does not add a legend or distinguishing features to the geoms:
I try to reproduce but my plot is this:
I don't know if this is an version error or this way of plotting was deprecated.
CodePudding user response:
Do you want this?
ggplot(data = mpg)
geom_smooth(
mapping = aes(x = displ, y = hwy, color = drv),
show.legend = FALSE
)
facet_wrap(~drv, scales = "free_x")