如何在R中的字符串結尾刪除雙空格？

Question

我試圖修正一些細胞在一個蹣跚。我感興趣的列包含在開始或結束時帶有空格和雙空格的字符串。

我問

• Merge Multiple spaces to single space; remove trailing/leading spaces
• How to remove extra white space between words inside a character vector using?
• How to remove all whitespace from a string?
• How to trim leading and trailing whitespace in R?

這是我在做什麼

重複的例子，以前看到這些職位

library(dplyr) 

mtcars2 = tbl_df(mtcars) %>% 
    mutate(name = rownames(mtcars)) %>% 
    mutate(name = gsub("^ *|(?<=) | *$", "", name, perl = TRUE)) %>% 
    mutate(name = gsub("^\\s+|\\s+$", "", name)) %>% 
    mutate(name = iconv(name, from = "", to = "ASCII//TRANSLIT", sub = "")) 

head(mtcars2, 3) 

而且這樣做，一些雙空格堅持後的結果是

# A tibble: 3 × 12 
    mpg cyl disp hp drat wt qsec vs am gear carb   name 
    <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>   <chr> 
1 21.0  6 160 110 3.90 2.620 16.46  0  1  4  4  Mazda RX4 
2 21.0  6 160 110 3.90 2.875 17.02  0  1  4  4 Mazda RX4 Wag 
3 22.8  4 108 93 3.85 2.320 18.61  1  1  4  1 Datsun 710 

但在我的數據集！

是否有一個更通用的命令來刪除字符串末尾的空格？提前謝謝了 ！

Answer 1

您是否試過trimws()函數？

> trimws(' hello ') 
[1] "hello"