[Fixed] Error: ‘\u’ Used Without Hex Digits In Character String Starting “”c:\u”

Error messages are an unavoidable part of programming. Not only can typographical errors occur from time to time, but they can also be caused by other issues.

Because error messages are unavoidable, you must learn how to deal with them as well as what causes them. Loading files is a common source of error messages, and this one is caused by incorrect file address formatting.

In this article, we shall explore the” ‘\u’ Used Without Hex Digits In Character String Starting “”c:\u” “error and try to find a solution.

When Can You Expect This Error?

  • If the file name, location, or file path character sequence is not properly formatted, this R code error will occur when using the read.csv() function.
  • Unfortunately, the error message’s description does not provide any useful information to the average programmer.
  • This can be perplexing because you would not expect to see a hexadecimal digit in a file’s address. The following code is an example of this problem.
# error source: '\u' used without hex digits in character string starting ""c:\u"
  • At first glance, nothing appears to be wrong; after all, the file address is properly formatted if you enter it into your computer’s “command prompt.”
  • The issue is that this character set syntax is incorrect when used in this context.

Why Does This Error Occur?

  • This message appears after the first backslash. It is due to the fact that the backslash serves as a string literal indicator.
  • String literals are characters or strings enclosed in quotes that have a special meaning.
  • These definitions include text formatting, octal digits, ascii characters, unicode characters, and hexadecimal numbers.
  • When you use a single backslash followed by a letter, it searches for that unique meaning.
  • Because the letter “U” has no special meaning, it looks for “x,” which represents a hexadecimal number.
  • As a result, you cannot use backslashes in this manner, and the program will generate this error message if you try.

How To Fix This Error?

The solution to this problem is actually quite simple. Even better, you don’t just have one solution; you have three. Each of these methods employs a unique approach to avoiding the backslash issue.

# solution 1: '\u' used without hex digits in character string starting ""c:\u"
x = read.csv("C:\\Users\\Bob\\Desktop\\problem.csv")
  • The first method is to simply add another backslash. This is due to the fact that “” has the unique meaning of a single backslash.
# solution 2: '\u' used without hex digits in character string starting ""c:\u" 
x = read.csv("C:/Users/Bob/Desktop/problem.csv")
  • The second method involves using a forward slash. This method avoids the problem entirely by removing the backslash.
# solution 3: '\u' used without hex digits in character string starting ""c:\u"
x = read.csv(file = "C:\Users\Bob\Desktop\problem.csv")
  • The third method is to use the read.csv() function to equate the string to the file variable. This method preserves the original format while removing special meanings from hex digits or other supplementary character classes.

Also read:- [Comprehensive Guide] Pip Install Requirements.Txt In Python


This is a common mistake because the standard file path address system or character sequence does not function properly.

However, once you are aware of it, it is simple to correct and avoid. You can use any of these three solutions to avoid receiving this R code error message, so try them all.

If you have any questions, leave them in the comments down below.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top