Question

__________ function is used in applying a function each level of factors. (a) With() (b) By() (c) To() (d) Here() I had been asked this question during an interview. I would like to ask this question from Functions in division Control Structures, Functions, Scoping Rules, Loop Functions and Debugging of R Programming Select the correct answer from above options

Answer 1

Correct answer is (b) By() For explanation: BY () function is used for applying a function each level of factors. R has a large number of in-built functions and also user can create their own functions. In R, a function is an object. So the R interpreter is able to pass control to the function.