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ggplot2でplotのtype="b"に似たプロットをする。

Last updated at Posted at 2018-01-28

簡単なのは、geom_line()とgeom_point()の間に、背景色と同じ色で大きめの点をプロットするgeom_point()を挿入する方法。

library(ggplot2)

ggplot(mtcars, aes(mpg, wt)) + theme_bw() +
    geom_line() +
    geom_point(size=5, color="white") + # 挿入
    geom_point()

mtcarsは自動車の燃費等に関するデータセット(32台分)。wt: Weight (1000 lbs)、mpg: Miles/(US) gallon。

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