r语言去掉character里面的空格

可以使用trimws()函数来去掉字符向量中的空格，例如：

x <- c("  apple", " banana ", "pear ")

# 去掉左侧和右侧的空格
trimws(x)

# 去掉左侧的空格
trimws(x, "left")

# 去掉右侧的空格
trimws(x, "right")

输出：

[1] "apple"  "banana" "pear"  

[1] "apple"       "banana "     "pear "       

[1] "  apple" " banana" "pear"