Create the scatterplot in the High School Course of Study Guide for Mathematics of Japan (2018)

iris-scatterplot.R

# The current stable version of {car} package (Ver. 3.0-0) does not output scatterplots properly.
# Instead, use the development version as following:
# install.packages("car", repos="http://R-Forge.R-project.org")

car::scatterplot(Sepal.Length ~ Petal.Width | Species,
    data = iris,
    boxplots= "xy", xlab="", ylab="",
    grid = FALSE, legend = FALSE,
    col = "black",
    regLine = FALSE, smooth = FALSE)

memo.md

This script (iris-scatterplot.R) creates the scatterplot with two boxplots in the High School Course of Study Guide for Mathematics of Japan (2018) Kōtō Gakkō Gakushū Shidō Yōryō Kaisetsu Sūgaku-hen, p. 48.

result-iris-scatterplot-course-of-study.png