October 2017
Intermediate to advanced
480 pages
9h 49m
Japanese
Content preview from Rではじめるデータサイエンス
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402
22
章
ggplot2
でコミュニケーションのためのグラフ作成
（
color = white
）を使い、主要データレイヤーの下に引く。データから注意をそらさず、見やす
くなる。
●
geom_rect()
を使って、問題の点の周りに四角形を描く。四角形の枠は、エステティック属性
xmin
,
xmax
,
ymin
,
ymax
で定義する。
●
geom_segment()
に
arrow
引数を使って、矢印で注意を喚起する。エステティック属性
x
と
y
で開
始位置を、
xend
と
yend
で終止位置を定義する。
限界は想像力（およびエステティックに好ましいアノテーションの位置を決めるための忍耐）だけ
です。
1. 無限位置の
geom_text()
を使ってプロットの4隅にテキストを置きなさい。
2.
annotate()
のドキュメントを読みなさい。
tibble
を作らないでプロットにテキストラベルを追
加するにはどう使えばよいか。
3.
geom_text()
のラベルは、ファセットとはどう関係するか。1つのファセットにラベルを付ける
にはどうすればよいか。各ファセットに異なるラベルを付けるにはどうするか（ヒント：元のデー
タを考えてください）。
4.
geom_label()
のどんな引数が、背景の箱の見かけを制御するか。
5.
arrow()
の4つの引数は何か。どのように働くか。最も重要なオプションを示す一連のプロット
を作りなさい。
22.4
スケール
コミュニケーションのためにプロットを改善する第3 の方法は、スケールを調整する ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.