The R programming language comes with a number of built-in functions to work with character strings. In this tutorial, we will look at one such function that helps us get the length of a string in R with the help of some examples.
How to find the length of a string in R?
You can use the built-in
nchar() function to get the length of a string in R. Pass the string as an argument to the function.
The following is the syntax –
# length of string s nchar(s)
nchar() function returns the number of characters in the string (which is the same as the length of the string).
Let’s now look at some examples of using the above syntax.
Length of a string using
Let’s apply the
nchar() function on a string, for example, “Avengers Endgame”.
# create a string s <- "Avengers Endgame" # get length of s print(nchar(s))
We get 16 as the length of the string “Avengers Endgame”. This is the correct length since there is a total of 16 characters in the above string.
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Length of each string in a vector
If you apply the
nchar() function to a string vector, it will return a vector with the length of each corresponding string in the vector.
Let’s look at an example.
# create a vector of strings vec <- c("you", "are", "my", "fire") # get length of each string in vec print(nchar(vec))
 3 3 2 4
You can see that we get the length of each string the vector
vec with the
What if the string vector has
Let’s find out.
This time, we’ll add some
NA values to the above vector and then apply the
# create a vector of strings with some NA values vec <- c("you", "are", NA, "my", "fire", NA) # get length of each string in vec print(nchar(vec))
 3 3 NA 2 4 NA
We get the length for each valid string and
NA for the
NAs in the above vector.
You might also be interested in –
- Compare Two Strings in R (With Examples)
- R – Remove Whitespaces From String
- Convert Numeric Type to Character Type in R
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