November 2019
Intermediate to advanced
472 pages
9h 23m
Japanese
Content preview from Rグラフィックスクックブック 第2版 ―ggplot2によるグラフ作成のレシピ集
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276
11
章 ファセット
レシピ
11.2
ファセットで個別の軸を使う
問題
軸の範囲または要素が異なるサブプロットを作りたい。
解決策
scales
を
"free_x"
、
"free_y"
または
"free"
に設定します（図11-3）。
#
基本プロットを作成
mpg_plot <- ggplot(mpg, aes(x = displ, y = hwy)) +
geom_point()
# y
をフリースケールに
mpg_plot +
facet_grid(drv ~ cyl, scales = "free_y")
# x
と
y
をフリースケールに
mpg_plot +
facet_grid(drv ~ cyl, scales = "free")
レシピ
11.2
ファセットで個別の軸を使う
277
図11-3 上：yをフリースケールにしたもの 下：xとyをフリースケールにしたもの
解説
y
をフリースケールにするとサブプロットの各行は個別に
y
の範囲を持ちます。
x
をフリースケールに
すると列に対して同じ効果があります。
各行や列の範囲を直接指定することはできませんが、望まないデータを取り除いたり（範囲の縮小）、
geom_blank()
を追加する（範囲の拡張）ことで制御できます。
関連項目
フリースケールと離散値軸で分割する例は「レシ ...
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