Question

which of the following statement gives cumulative sum?

(a) cumsum(x,na=rm=TRUE)

(b) cumprod(x)

(c) cummax(x)

(d) cummin(x)

I got this question during an internship interview.

This is a very interesting question from Commands in section Commands, Packages, Visualizing Data and Linear Regression of R Programming

Answer 1

Right option is (a) cumsum(x,na=rm=TRUE)

The explanation is: cummax() function returns the cumulative maxima.