Question

The ________ stores the nominal values as a vector of integers in the range of 1 to unique values in the nominal variable.

(a) Factor

(b) Matrix

(c) Lists

(d) Functions

I got this question by my college professor while I was bunking the class.

I would like to ask this question from Data Types in portion Nuts and Bolts and Getting Data In and Out of R Programming

Answer 1

Right choice is (a) Factor

Easiest explanation: The factor stores the nominal values as a vector of integers in the range [1… k] (where k is the no. of unique values of the nominal variable), and an internal vector of character strings (the original values) mapped to these integers.