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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64
4
章 折れ線グラフ
図4-5 上：点はデータポイントの場所を示す 下：同じデータで、y軸を対数表示にしたグラフ
y
軸を対数表示にすると、比例的に推移していた人口増加率が、この
1000
年で大きく伸びたことが
わかります。紀元前では、
5000
年でおよそ
10
倍というほぼ一定の変化率です。最近の
1000
年では、人
口はそれよりも大幅に速く増加しています。また、人口は近代のほうがより頻繁に（また、おそらくよ
り正確に）推計されているということもわかります。
関連項目
点の体裁を変更する方法については、「レシピ4.5 点の体裁を変更する」を参照してください。
レシピ
4.3
複数の線を持つ折れ線グラフを作成する
問題
折れ線グラフで
2
本以上の折れ線を描画したい。
解決策
x
軸と
y
軸にマッピングされた変数に加えて、
colour
または
linetype
に別の変数（離散値変数）を
マッピングします（図 4-6）。
library(gcookbook) # tg
データセットを使うために
gcookbook
を読み込む
# supp
を
colour
にマッピングする
レシピ
4.3
複数の線を持つ折れ線グラフを作成する
65
ggplot(tg, aes(x = dose, y = length, colour = supp)) +
geom_line() ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.