Which of the following will reverse the order of values in x ?
A. rev(x)
B. max(x, na.rm=TRUE)
C. all(x)
D. x%in%y
Answer:A
Which of the following will reverse the order of values in x ?
A. rev(x) B. max(x, na.rm=TRUE) C. all(x) D. x%in%y
Explanation:rev provides a reversed version of its argument. 2. Which of the following finds row sums for each level of a grouping variable ?