Modifying stat_smooth (2)
In this exercise we'll take a look at the standard error ribbons, which show the 95% confidence interval of smoothing models. ggplot2 and the Vocab data frame are already loaded for you.
Vocab has been given an extra column, year_group, splitting the dates into before and after 1995.
This exercise is part of the course
Intermediate Data Visualization with ggplot2
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Using Vocab, plot vocabulary vs. education, colored by year group
___ +
# Add jittered points with transparency 0.25
___ +
# Add a smooth lin. reg. line (with ribbon)
___