trimws函数——去掉字符串头尾的空格

Posted 2023-03-05

参考技术A Remove Leading/Trailing Whitespace
作用：去掉字符串头/尾的空格。

Remove leading and/or trailing whitespace from character strings.

trimws(x, which = c("both", "left", "right"))

x
a character vector
which
a character string specifying whether to remove both leading and trailing whitespace (default), or only leading ("left") or trailing ("right"). Can be abbreviated.
Details

For portability, ‘whitespace’ is taken as the character class [ \t\r\n] (space, horizontal tab, line feed, carriage return).