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
9.2
テキストの体裁を変更する
239
1
つ目は
ggtitle()
と負の
vjust
値を使う方法です。この方法の欠点はプロット領域の上部にタイトル
用の余白が確保されたままになることです。
2
つ目はタイトルの代わりにテキスト注釈を使う方法です。
x
位置に
x
範囲の中央を設定し、
y
位置に
Inf
を指定して注釈位置をプロット領域の上端に設定します。さらに、テキストがすべてプロット領域
内に入れるには正の
vjust
値が必要です。
#
タイトルを中に移す
hw_plot +
ggtitle("Age and Height of Schoolchildren") +
theme(plot.title = element_text(vjust = -8))
#
テキスト注釈をタイトルの代わりに使う
hw_plot +
annotate("text", x = mean(range(heightweight$ageYear)), y = Inf,
label = "Age and Height of Schoolchildren", vjust = 1.5, size = 4.5)
図9-3 左：ggtitle()と負のvjust値を指定したタイトル（プロット領域の上にある余白に注目）
右：図の上端にテキスト注釈を追加した場合
レシピ
9.2
テキストの体裁を変更する
問題
グラフ中にあるテキストの体裁を変更したい。
解決策
タイトル、軸ラベル、軸目盛など、テーマ要素の体裁を指定するには、
theme()
を使い
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.