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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30
1
章
ggplot2
によるデータ可視化
ggplot(data = mpg, mapping = aes(x = cty, y = hwy)) +
geom_point() +
geom_abline() +
coord_fixed()
1.10
階層グラフィックス文法
前節までで、散布図、棒グラフ、箱ひげ図などの作り方だけでなく、多くのことを学びました。
ggplot2
を使ってあらゆる種類のグラフを描く場合に使える基本を学びました。コードテンプレート
に位置調整、
stat
、座標系、ファセット方式を追加して、学んだことを示します。
ggplot(data = <DATA>) +
<GEOM_FUNCTION>(
mapping = aes(<MAPPINGS>),
stat = <STAT>,
position = <POSITION>
) +
<COORDINATE_FUNCTION> +
<FACET_FUNCTION>
この新テンプレートには、7 つの引数、山括弧で括った単語があります。実際には、
ggplot2
がデー
タ、マッピング、
geom
関数を除いて、有用なデフォルト値を設定しているので、7引数すべてを指定
することはほとんどありません。
テンプレートの7 引数は、プロットを描くための形式系であるグラフィックス文法を構成します。
グラフィックス文法は、どんなプロットでも、データセット、
geom
関数、マッピング集合、
stat
、
位置調整、座標系、ファセット方式の組み合わせで一意に表すことができる ...
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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.