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3

When I type "xfc" into R it leads to [1] "ü". I don't want that, I want this to lead to [1] "xfc". I also do not really understand why Encoding("xfc") is "latin1" although I changed the settings in Code->Saving to UTF-8. I want to write a function that replaces some special characters like "ü" by "xfc" but I can't achieve this:

> stringr::str_replace_all("Müller", "ü", "xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Mxfcller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\\xfc")
[1] "M\xfcller"

What I really want is [1] "Mxfcller"

(How) can I achieve this?

r regex encoding special-characters

share|improve this question

edited Mar 27 at 9:18

TobiSonne

asked Mar 27 at 8:26

TobiSonneTobiSonne

1071010 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  check out ?Quotes, it seems like R interprets "xnn" as character with the hexcode nn. I do not know if there is a workaround for this behaviour
  
  – brettljausn
  Mar 27 at 8:48
  

  
  
  
  

add a comment | 

3

When I type "xfc" into R it leads to [1] "ü". I don't want that, I want this to lead to [1] "xfc". I also do not really understand why Encoding("xfc") is "latin1" although I changed the settings in Code->Saving to UTF-8. I want to write a function that replaces some special characters like "ü" by "xfc" but I can't achieve this:

> stringr::str_replace_all("Müller", "ü", "xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Mxfcller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\\xfc")
[1] "M\xfcller"

What I really want is [1] "Mxfcller"

(How) can I achieve this?

r regex encoding special-characters

share|improve this question

edited Mar 27 at 9:18

TobiSonne

asked Mar 27 at 8:26

TobiSonneTobiSonne

1071010 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  check out ?Quotes, it seems like R interprets "xnn" as character with the hexcode nn. I do not know if there is a workaround for this behaviour
  
  – brettljausn
  Mar 27 at 8:48
  

  
  
  
  

add a comment | 

When I type "xfc" into R it leads to [1] "ü". I don't want that, I want this to lead to [1] "xfc". I also do not really understand why Encoding("xfc") is "latin1" although I changed the settings in Code->Saving to UTF-8. I want to write a function that replaces some special characters like "ü" by "xfc" but I can't achieve this:

> stringr::str_replace_all("Müller", "ü", "xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Mxfcller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\\xfc")
[1] "M\xfcller"

What I really want is [1] "Mxfcller"

(How) can I achieve this?

r regex encoding special-characters

share|improve this question

edited Mar 27 at 9:18

TobiSonne

asked Mar 27 at 8:26

TobiSonneTobiSonne

1071010 bronze badges

> stringr::str_replace_all("Müller", "ü", "xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Mxfcller"
> stringr::str_replace_all("Müller", "ü", "\xfc")
[1] "Müller"
> stringr::str_replace_all("Müller", "ü", "\\xfc")
[1] "M\xfcller"

share|improve this question

edited Mar 27 at 9:18

TobiSonne

asked Mar 27 at 8:26

TobiSonneTobiSonne

1071010 bronze badges

share|improve this question

edited Mar 27 at 9:18

TobiSonne

asked Mar 27 at 8:26

TobiSonneTobiSonne

1071010 bronze badges

asked Mar 27 at 8:26

TobiSonneTobiSonne

1071010 bronze badges

asked Mar 27 at 8:26

TobiSonneTobiSonne

1071010 bronze badges

1 Answer
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0

The last line gives the result you want. The backslash is escaped when the string is printed. To see that, let's save the string to file and then see the content of the file.

s <- stringr::str_replace_all("Müller", "ü", "\\xfc")

writeLines(s, "test.txt")

cat(readLines("test.txt"))
#> Mxfcller

^{Created on 2019-03-27 by the reprex package (v0.2.1)}

Also see this GitHub issue: https://github.com/STAT545-UBC/Discussion/issues/394

share|improve this answer

answered Mar 27 at 9:11

dipetkovdipetkov

1,49611 silver badge88 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  x <- readLines("test.txt"). Now x is still "M\xfcller". I want to pass x to another function and x has to be "Mxfcller"
  
  – TobiSonne
  Mar 27 at 9:15
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  R treat strings a little bit differently. If you try x = "Mxfcller", you get "Müller".
  
  – dipetkov
  Mar 27 at 9:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, you can see in the file that the string is Mxfcller but R shows it as M\xfcller.
  
  – dipetkov
  Mar 27 at 9:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  s <- "ab" and print(s) leads to "ab" und not "a\b" so there must be a difference? Or am I wrong?
  
  – TobiSonne
  Mar 27 at 11:30
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  R doesn't interpret "b" as a special character. Try "ax" and you get an error about "hex digits" which is what "xfc" is.
  
  – dipetkov
  Mar 27 at 11:52
  

  
  
  
  

add a comment | 

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0

The last line gives the result you want. The backslash is escaped when the string is printed. To see that, let's save the string to file and then see the content of the file.

s <- stringr::str_replace_all("Müller", "ü", "\\xfc")

writeLines(s, "test.txt")

cat(readLines("test.txt"))
#> Mxfcller

^{Created on 2019-03-27 by the reprex package (v0.2.1)}

Also see this GitHub issue: https://github.com/STAT545-UBC/Discussion/issues/394

share|improve this answer

answered Mar 27 at 9:11

dipetkovdipetkov

1,49611 silver badge88 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  x <- readLines("test.txt"). Now x is still "M\xfcller". I want to pass x to another function and x has to be "Mxfcller"
  
  – TobiSonne
  Mar 27 at 9:15
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  R treat strings a little bit differently. If you try x = "Mxfcller", you get "Müller".
  
  – dipetkov
  Mar 27 at 9:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, you can see in the file that the string is Mxfcller but R shows it as M\xfcller.
  
  – dipetkov
  Mar 27 at 9:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  s <- "ab" and print(s) leads to "ab" und not "a\b" so there must be a difference? Or am I wrong?
  
  – TobiSonne
  Mar 27 at 11:30
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  R doesn't interpret "b" as a special character. Try "ax" and you get an error about "hex digits" which is what "xfc" is.
  
  – dipetkov
  Mar 27 at 11:52
  

  
  
  
  

add a comment | 

0

The last line gives the result you want. The backslash is escaped when the string is printed. To see that, let's save the string to file and then see the content of the file.

s <- stringr::str_replace_all("Müller", "ü", "\\xfc")

writeLines(s, "test.txt")

cat(readLines("test.txt"))
#> Mxfcller

^{Created on 2019-03-27 by the reprex package (v0.2.1)}

Also see this GitHub issue: https://github.com/STAT545-UBC/Discussion/issues/394

share|improve this answer

answered Mar 27 at 9:11

dipetkovdipetkov

1,49611 silver badge88 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  x <- readLines("test.txt"). Now x is still "M\xfcller". I want to pass x to another function and x has to be "Mxfcller"
  
  – TobiSonne
  Mar 27 at 9:15
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  R treat strings a little bit differently. If you try x = "Mxfcller", you get "Müller".
  
  – dipetkov
  Mar 27 at 9:26
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, you can see in the file that the string is Mxfcller but R shows it as M\xfcller.
  
  – dipetkov
  Mar 27 at 9:31
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  s <- "ab" and print(s) leads to "ab" und not "a\b" so there must be a difference? Or am I wrong?
  
  – TobiSonne
  Mar 27 at 11:30
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  R doesn't interpret "b" as a special character. Try "ax" and you get an error about "hex digits" which is what "xfc" is.
  
  – dipetkov
  Mar 27 at 11:52
  

  
  
  
  

add a comment | 

The last line gives the result you want. The backslash is escaped when the string is printed. To see that, let's save the string to file and then see the content of the file.

s <- stringr::str_replace_all("Müller", "ü", "\\xfc")

writeLines(s, "test.txt")

cat(readLines("test.txt"))
#> Mxfcller

^{Created on 2019-03-27 by the reprex package (v0.2.1)}

Also see this GitHub issue: https://github.com/STAT545-UBC/Discussion/issues/394

share|improve this answer

answered Mar 27 at 9:11

dipetkovdipetkov

1,49611 silver badge88 bronze badges

s <- stringr::str_replace_all("Müller", "ü", "\\xfc")

writeLines(s, "test.txt")

cat(readLines("test.txt"))
#> Mxfcller

share|improve this answer

answered Mar 27 at 9:11

dipetkovdipetkov

1,49611 silver badge88 bronze badges

answered Mar 27 at 9:11

dipetkovdipetkov

1,49611 silver badge88 bronze badges

answered Mar 27 at 9:11

dipetkovdipetkov

1,49611 silver badge88 bronze badges