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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70
4
章 ワークフロー：スクリプト
4.1
コードを実行する
スクリプトエディタは、複雑な
ggplot2
プロットや長い
dplyr
処理を組み上げるのにも最適な場所
です。スクリプトエディタを効果的に使うには、大事なキーボードショートカットCmd/Ctrl-Enter
を覚えておきます。これで現在の R 式をコンソールで実行できます。例えば、次のコードで、カー
ソルが
█
の位置にあるとき、Cmd/Ctrl-Enterを押せば
not_cancelled
を作るコマンドが実行されま
す。そしてカーソルが次の文（
not_cancelled %>%
で始まる）に移ります。これにより、Cmd/Ctrl-
Enterを繰り返し押して完全なスクリプトの実行が容易にできます。
library(dplyr)
library(nycflights13)
not_cancelled <- flights %>%
filter(!is.na(dep_delay)
█
, !is.na(arr_delay))
not_cancelled %>%
group_by(year, month, day) %>%
summarize(mean = mean(dep_delay))
式を順に実行するのではなく、Cmd/Ctrl-Shift-Sでスクリプト全体を一度に実行することもでき
ます。これを定期的に行えば、コードの重要な部分をすべて取り入れていることを確認できます。
常に必要なパッケージからスクリプトを開始することを勧めます。そうすれば、コー ...
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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.