Plotting a line over time
In the last chapter, you learned how to summarize()
the votes dataset by year, particularly the percentage of votes in each year that were "yes".
You'll now use the ggplot2
package to turn your results into a visualization of the percentage of "yes" votes over time.
This exercise is part of the course
Case Study: Exploratory Data Analysis in R
Exercise instructions
The by_year
dataset has the number of votes and percentage of "yes" votes each year.
- Load the
ggplot2
package. - Use
ggplot()
with thegeom_line
layer to create a line plot withyear
on the x-axis andpercent_yes
on the y-axis.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Define by_year
by_year <- votes_processed %>%
group_by(year) %>%
summarize(total = n(),
percent_yes = mean(vote == 1))
# Load the ggplot2 package
# Create line plot
___(by_year, ___) ___
___