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
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.
46
3
章 棒グラフ
#> 1 c39 d16 3.18 0.957 10 0.303 58.5
#> 2 c39 d20 2.8 0.279 10 0.0882 47.4
#> 3 c39 d21 2.74 0.983 10 0.311 65.1
#> 4 c52 d16 2.26 0.445 10 0.141 41.5
#> 5 c52 d20 3.11 0.791 10 0.250 52.6
#> 6 c52 d21 1.47 0.211 10 0.0667 34.9
各グループごとに
Weight
のパーセント割合を計算するためには、
dplyr
の
group_by
と
mutate()
関数
を使います。先ほどの例では、
group_by()
関数で
dplyr
に「ここから先の処理は
Date
によって分割さ
れたグループに対して行う」と伝えています。そして、
mutate()
関数によって、「各行の
Weight
の値を
グループ内のすべての
Weight
の合計値で割った値を使って、新しい列を計算する」と伝えています。
cabbage_exp
と
ce
の出力 が異 なることに気付 いた 人がい るかもしれませ ん。これ は、
cabbage_exp
が通常のデータフレームであるのに対し、
ce
が
tibble
であるためです。
tibble
は、データフレームにいくつかの追加情報を付与したものです。
dplyr
パッケージは
tibble
を作成します。詳細については、「
15
章 データの前処理」を参照してください。
新しい列を計算した後は、通常 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.