The “str_count” Function in R

• Package: stringr

• Purpose: To count the number of occurrences of a pattern in each element of a character vector.

• General Class: String Manipulation

• Required Argument(s):

• string: A character vector in which to count occurrences.

• pattern: The pattern for which occurrences are counted.

• Notable Optional Arguments:

• ...: Additional arguments influencing the counting process, such as ignore_case to perform case-insensitive matching.

• Example:

• # Example usage
  library(stringr)
  
  sentence <- "The quick brown fox jumps over the lazy dog. The fox is a clever animal."
  
  # Count the number of occurrences of "fox" in the sentence
  fox_count <- str_count(sentence, pattern = "fox")
  
  print(fox_count)

• In this example, the str_count function from the stringr package is used to count the number of occurrences of the pattern “fox” in the character vector sentence. The result is an integer vector indicating the count of occurrences in each element.