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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レシピ
4.6
網掛け領域付きのグラフを作成する
73
図4-16 塗りつぶし色を手動で黒と白に指定し、点の重複を避けた折れ線グラフ
関連項目
さまざまな点の形を使用する方法については「レシピ5.3 点の形を指定する」を、色についての詳細
は「12章 色を使う」を参照してください。
レシピ
4.6
網掛け領域付きのグラフを作成する
問題
網掛け（シェード）領域の付いたグラフを作成したい。
解決策
geom_area()
を使って網掛け領域を描画します。結果は図4-17のようになります。
# sunspot.year
データセットを変換し、今回の例で使用するデータフレームを作成する
sunspotyear <- data.frame(
Year = as.numeric(time(sunspot.year)),
Sunspots = as.numeric(sunspot.year)
)
ggplot(sunspotyear, aes(x = Year, y = Sunspots)) +
geom_area()
74
4
章 折れ線グラフ
図4-17 網掛け領域付きのグラフ
解説
デフォルトでは、網掛け領域は濃いダークグレーで描画され、輪郭線は付きません。網掛けの色は、
fill
を設定することで変更できます。次の例では、網掛けの ...
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