Question

Which of the following tests each element of x for membership in y?

(a) y%in%x

(b) all(x)

(c) any(x)

(d) x%in%y

I had been asked this question in an interview for internship.

I need to ask this question from Commands topic in division Commands, Packages, Visualizing Data and Linear Regression of R Programming

Answer 1

Right answer is (d) x%in%y

To elaborate: y%in%x tests each element of y for membership in x. x%in%y tests each element of x for membership in y.