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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21.4
コードチャンク
387
knitr::opts_chunk$set(
echo = FALSE
)
こうすると、デフォルトでコードは隠蔽され、（
echo = TRUE
で）選んだ場合だけチャンクを表示し
ます。
message = FALSE
かつ
warning = FALSE
という設定も考えられますが、これでは最終文書で
一切メッセージが表示されないので、デバッグが困難です。
21.4.6
インラインコード
RコードをR マークダウンに埋め込むには別の方法もあります。
`r `
で直接埋め込みます。テキ
スト中でデータの特性を述べるときにはとても便利です。例えば、本章の冒頭で用いた文書例には
次のような節がありました。
We have data about
`r nrow(diamonds)`
diamonds. Only
`r
nrow(diamonds) - nrow(smaller)`
are larger than 2.5 carats. The
distribution of the remainder is shown below:
このレポートを
knit
すると、計算結果がテキストに埋め込まれます。
We have data about 53940 diamonds. Only 126 are larger than 2.5
carats. The distribution of the remainder is shown below:
テキストに数値を挿入するときには、
format() ...
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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.