Question

Which of the following finds the maximum value in the vector x, exclude missing values?

(a) rm(x)

(b) max(x, na.rm=TRUE)

(c) all(x)

(d) x%in%y

I had been asked this question in an online quiz.

My question is taken from Commands topic in section Commands, Packages, Visualizing Data and Linear Regression of R Programming

Answer 1

The correct choice is (b) max(x, na.rm=TRUE)

The best explanation: all(x%in%y)  returns true if x is a proper subset of y.