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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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.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.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.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.
414
22
章
ggplot2
でコミュニケーションのためのグラフ作成
22.6
テーマ
プロットの非データ要素をテーマ設定でカスタム化できます。
ggplot(mpg, aes(displ, hwy)) +
geom_point(aes(color = class)) +
geom_smooth(se = FALSE) +
theme_bw()
ggplot2
には、図 22-3に示すように、8つのテーマがデフォルトで用意されています。Jeffrey
Arnoldが作った
ggthemes
（https://github.com/jrnold/ggthemes）のような追加パッケージには多数
のテーマが含まれています。
デフォルトのテーマの背景がなぜ灰色なのかと多くの人が不思議がります。これはデータ表示し
ながら格子線が見えるからです。（位置がはっきりするので重要な）白の格子線が見えて、見栄えが
邪魔になりません。灰色の背景は、テキストの色と同系色で、グラフが背景を白にした場合のように
目に飛び込まず、文書全体の流れに合致します。また、灰色の背景は、色が連続した場を作り、プロッ
トが1 つのまとまった視覚要素として知覚されるようにします。
各テーマの個別要素を、
y
軸のフォントの色とサイズのように、制御することもできます。残念な
がら、そこまでの詳細は本書の
レベルを超えるので、
ggplot2
の本（http://ggplot2.org/book/）を読む
必要があります。特定の企業、組織、雑誌のスタイルに合わせ ...
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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.