Lec14 More Data Manipulation

Announcements

• Middlebury Math Department Hike up Snake Mountain on Saturday October 22nd. Meet in front of Warner at 1pm.
• CTLR Tutoring: 3 tutors for this class now
• Lec13 learning check discussion
• Statistical literacy lesson for the day: Figure 2: Voter Turnout

ggplot(data=voter_data, aes(x=year, y=percent_turnout, col=demographic)) +
    geom_line() +
    geom_point()

In-Class

• Slides:
  • %>% pipe operator, pronounced then
  • summarise() observations that have been group_by() another variable.
• Note about dplyr cheatsheet
• Section 5.1.3 of textbook

After-Class Updates

• Lec14 learning check discussion