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
8.2
連続値の軸の範囲を設定する
193
図8-2 反転させた軸でx 軸の順序を逆転させた箱ひげ図
関連項目
変数が連続値の場合に順序を逆転させる方法は、「レシピ 8.3 連続値軸を逆転させる」を参照してく
ださい。
レシピ
8.2
連続値の軸の範囲を設定する
問題
軸の範囲（下限値や上限値）を設定したい。
解決策
xlim()
や
ylim()
を使って連続値軸の下限値や上限値を設定することができます。図8-3はデフォル
トの
y
軸の範囲のままグラフを表示したものと、手動で
y
の下限値と上限値を設定したものです。
pg_plot <- ggplot(PlantGrowth, aes(x = group, y = weight)) +
geom_boxplot()
#
基本プロットを表示
pg_plot
pg_plot +
ylim(0, max(PlantGrowth$weight))
194
8
章 軸
図8-3 左：デフォルトの範囲で表示した箱ひげ図 右：手動で範囲を設定した箱ひげ図
後者の例では、
y
の範囲を
0
から
weight
列の最大値に設定しました。列の最大値の代わりに、定数
（
10
などの値）を最大値として設定することもできます。
解説
ylim()
は
scale_y_continuous()
を使って下限値や上限値を設
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.