Using stat_sum
In the Vocab dataset, education and vocabulary are integer variables. In the first course, you saw that this is one of the four causes of overplotting. You'd get a single point at each intersection between the two variables.
One solution, shown in the step 1, is jittering with transparency. Another solution is to use stat_sum(), which calculates the total number of overlapping observations and maps that onto the size aesthetic.
stat_sum() allows a special variable, ..prop.., to show the proportion of values within the dataset.
Latihan ini adalah bagian dari kursus
Intermediate Data Visualization with ggplot2
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
# Run this, look at the plot, then update it
ggplot(Vocab, aes(x = education, y = vocabulary)) +
# Replace this with a sum stat
geom_jitter(alpha = 0.25)