How to remove last n characters of a string in R
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we will learn how to remove the last n characters of a string in the R language.
Removing the last n characters
To remove the string’s last n characters, we can use the built-in substring() function in R.
The substring() function takes 3 arguments, the first one is a string, the second is start position, third is end position.
Here is an example, that removes the last 3 characters from the month string:
month = 'august'result = substring(month, 1, nchar(month)-3)print(result)
Output:
"aug"
In the example above, we have passed the 1, nchar(month)-3 as a second and third arguments to the substring() function. so it starts the extraction at position 1 and extracts up to the nchar(month)-3 of a string.
The nchar() function is used to caluclate the length of a string in R.
Note: The substring() function doesn’t modify the original string.
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