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
5.11
散布図の点にラベルを付ける
119
図5-29 線を細くして、ジッターをかけた縁のラグ
関連項目
オーバープロットについての詳細は、「レシピ5.5 オーバープロットを扱う」を参照してください。
レシピ
5.11
散布図の点にラベルを付ける
問題
散布図の点にラベルを付けたい。
解決策
1
つか
2
つ程度の点に注釈を付けるときには、
annotate()
か
geom_text()
を使うことができます。こ
の例では、
countries
データセットを使い、健康のための出費と幼児死亡率を
1,000
の幼児出生ごと
に関係を可視化します。問題を簡単にするために、データを
2009
年のものに絞り、また、
1
人あたり
$ 2,000
以上使用している国に絞っています。
library(gcookbook) # countries
データセットを使うために
gcookbook
を読み込む
library(dplyr)
#
データを
2009
年のものだけに限定し、さらに、
$2,000
以上使っている国に絞る
countries_sub <- countries %>%
120
5
章 散布図
filter(Year == 2009 & healthexp > 2000)
ベースとなる散布図オブジェクトを
countries_sp
（
countries ...
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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.