Imagine you have a vector of numbers and you want to create a new vector where each number is replaced by 'high' if it's greater than 10, and 'low' otherwise. How would you do this in R?

To create a new vector where each number is replaced by 'high' if it's greater than 10, and 'low' otherwise, you can use the ifelse() function. The syntax would be ifelse(numbers > 10, 'high', 'low'). This function performs a vectorized conditional operation and returns 'high' for numbers greater than 10, and 'low' for numbers less than or equal to 10.