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
9.4
テーマ要素の体裁を変更する
245
解説
ggplot2
のテーマ要素に共通のプロパティのいくつかは、
theme()
で変更できます。タイトル、凡例、
軸などこれらの多くはプロットの外側ですが、目盛線、背景色などいくつかはプロット領域の内部です。
ggplot2
組み込みのテーマに加えて、自分でテーマを作ることもできます。
組み込みテーマを使う際に、基本となるフォントファミリーやフォントサイズを指定できます（デフォ
ルトでは、基本となるフォントファミリーは
Helvetica
、デフォルトのフォントサイズは
12
です）。
hw_plot +
theme_grey(base_size = 16, base_family = "Times")
theme_set()
で現在の
R
セッションに対するデフォルトテーマを設定できます。しかし、現在のプロ
ジェクトと関係のない他の図に影響が出るかもしれないため、グローバルにオプションを設定するのは
一般的に良い考えでは
ありません。
#
現在のセッションに対するデフォルトテーマを設定
theme_set(theme_bw())
#
これは
theme_bw()
を使う
hw_plot
#
デフォルトテーマを
theme_grey()
に戻す
theme_set(theme_grey())
関連項目
ggplot2
に含まれている他のテーマは
https://ggplot2.tidyverse.org/reference/ggtheme.html
を参照
してください。
テーマを変更するには「レシ
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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.