Question

X <- (foo = 1:4, bar = c(T,T,F,F)) creates____.

A) A numeric vector "foo" and a logical vector "bar."
B) A character vector "foo" and a numeric vector "bar."
C) A named list with elements "foo" and "bar."
D) A matrix with named rows and columns.

Answer 1

The expression creates a named list in R with a numeric vector 'foo' and a logical vector 'bar', corresponding to answer option C.

Step-by-step explanation:

When you use the expression x <- (foo = 1:4, bar = c(T,T,F,F)) in R, you are creating a named list with elements "foo" and "bar".

The 'foo' element in this list is a numeric vector containing the numbers 1 to 4, and the 'bar' element is a logical vector containing two TRUE values followed by two FALSE values. Consequently, the correct answer to the given question is C) A named list with elements "foo" and "bar."