Remove Numbers from Character String in R (Example)
Table of contents:
Let’s take a look at some R codes in action…
We’ll use the following data as a basis for this R tutorial.
my_alphanum <- "aa11b2c33" # Create alphanumeric character string my_alphanum # Print string #  "aa11b2c33"
The previously shown output of the RStudio console shows the structure of our exemplifying data – A single character string containing numbers and letters.
Example: Remove Numbers from Alphanumeric Character String Using gsub() Function
This example shows how to select only the letters from a character string.
To accomplish this, we can apply the gsub function as shown in the following R code:
my_alpha <- gsub("[[:digit:]]", "", my_alphanum) # Extract letters my_alpha # Print letters #  "aabc"
The previous syntax has returned the character string “aabc”, i.e. only the letters of our input character string.
Video, Further Resources & Summary
In case you need more information on the R code of this page, I recommend watching the following video that I have published on my YouTube channel. In the video, I demonstrate the examples of this article.
In addition, you might read the other tutorials on https://www.statisticsglobe.com/.
- Remove Newline from Character String in R
- Extract Numbers from Character String Vector in R
- Remove All White Space from Character String
- Remove Parentheses in Character String in R
- R Programming Overview
This tutorial has illustrated how to keep only the letters of a character string in R programming. Tell me about it in the comments section below, in case you have any additional questions.