The “ifelse” Function in R

• Package: Base R (no specific package required)

• Purpose: Provides a vectorized way to perform conditional (if-else) operations on elements of a vector.

• General Class: Data Transformation

• Required Argument(s):

• test: A logical vector indicating which elements should be selected.

• yes: Values to be assigned to elements where test is TRUE.

• no: Values to be assigned to elements where test is FALSE.

• Notable Optional Arguments:

• None

• Example:

• # Example data for using the ifelse function
  ages <- c(25, 30, 22, 28, 35)
  
  # Create a new vector based on a condition using ifelse
  age_category <- ifelse(ages > 30, "Old", "Young")
  
  # Display the result
  print(age_category)

• In this example, the ifelse function is used to create a new vector (age_category) based on a condition (whether ages are greater than 30). If the condition is TRUE, the corresponding element in age_category is assigned the value “Old”; otherwise, it is assigned the value “Young”. The ifelse function allows for vectorized conditional operations on entire vectors.