Question

_____________ will produce a sequential vector c( (1,2,3,4,5,6,7,8,9)).

(a) Seq(9)

(b) Seq(10)

(c) Seq(15)

(d) Seq(12)

I have been asked this question at a job interview.

My query is from Functions in division Control Structures, Functions, Scoping Rules, Loop Functions and Debugging of R Programming

Answer 1

Right choice is (a) Seq(9)

To explain: Seq generates a sequence of a priori known pattern. Seq_along(6) will produce a vector with length 6 whereas seq(6) will produce a sequential vector from 1 to 6 c((1,2,3,4,5,6)).