Question

Point out the correct statement?

(a) Times use the POSIXct and POSIXlt class

(b) Dates and times have special classes in R that allow for numerical and statistical calculations

(c) Character strings can be coerced to Date/Time classes using the strptime function

(d) All of the mentioned

The question was posed to me by my school principal while I was bunking the class.

This interesting question is from Vectorized Operations topic in chapter R – Data Storage, Formats, Objects and Operations of R Programming

Answer 1

Correct choice is (d) All of the mentioned

Easiest explanation: Character strings can be coerced to Date/Time classes using the as.Date, as.POSIXlt, or as.POSIXct.