The “nchar” Function in R

• Package: Base R (No specific package, it’s a built-in function)

• Purpose: To count the number of characters in a character vector.

• General Class: String Manipulation

• Required Argument(s):

• x: A character vector for which to count the number of characters.

• Notable Optional Arguments:

• type: A character string specifying the type of counting. Default is "chars". Other options include "bytes" and "width".

• keepNA: Logical. If TRUE, NA values remain NA values (the default). If FALSE, NA values are given length 2 as if it were a character string.

• Example:

• # Example usage
  words <- c("apple", "banana", "orange", "grape")
  
  # Count the number of characters in each element of the vector
  char_counts <- nchar(words)
  
  print(char_counts)

• In this example, nchar is a built-in function in base R, and it is used to count the number of characters in each element of a character vector (words). The x argument is required, and additional optional arguments (type and keepNA) can be used to customize the counting behavior. The result is an integer vector with the counts of characters in each element of the input vector.