The “substring” Function in R

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

• Purpose: To extract or replace substrings from a character vector.

• General Class: String Manipulation

• Required Argument(s):

• text: A character vector from which to extract or replace substrings.

• first: Starting position(s) of the substring(s) to be extracted or replaced.

• last: Ending position(s) of the substring(s) to be extracted or replaced. The default is 1000000.

• Notable Optional Arguments:

• None

• Example:

• # Example usage
  sentence <- "The quick brown fox jumps over the lazy dog."
  
  # Extract a substring from position 5 to 9
  extracted_substring <- substring(sentence, first = 5, last =9)
  
  print(extracted_substring)

• In this example, substring is a built-in function in base R, and it is used to extract a substring from a character vector (sentence) starting from position 5 to position 9. The text, first, and last arguments are required, and there are no additional optional arguments. The result is a character vector with the extracted substring.