Explanation:
Converting R strings, or a vector of strings, to the upper case can be useful for several reasons, such as consistency, formatting, and comparison. However, one of the most appropriate reasons for converting a string to upper case is to aid in data validation.
Explanation:
One way to iterate over a matrix in R is to use a nested for-loop. A nested for-loop is a loop within a loop, where the outer loop iterates over the rows of the matrix and the inner loop iterates over the columns.
Explanation:
The code user <- c("Jane", "Emily", "Shauna") creates a character vector in R, not a string.
Explanation:
The <- operator in R is used for assignment, meaning it assigns the value on the right-hand side to the variable on the left-hand side.
Explanation:
In R, vector indexing starts at 1, not 0. So the first element of a vector has index 1, the second element has index 2, and so on.
