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R > LETTERS[-(2:25)] > "A" "Z" / ベクトルから特定のインデックスのものを除外

Last updated at Posted at 2016-09-14
動作環境
RStudio 0.99.903 on Windows 7 pro
R version 3.3.1 

ビルトインのLETTERSというものには"A"から"Z"までのアルファベットが入っている。
これはオブジェクトのタイプとしては「ベクトル」らしい。
@ Rで学ぶデータ・プログラミング入門 by 石田基広さん

その中で、除外の方法を以下に試した。

> LETTERS[-(2:25)]
[1] "A" "Z"

"B"から"Y"までを除外。

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