Question

_________ variables are categorical variables which can hold either string or numeric values.

(a) Factor

(b) Simpler

(c) Function

(d) Package

I have been asked this question in an online quiz.

This interesting question is from Functions in section Control Structures, Functions, Scoping Rules, Loop Functions and Debugging of R Programming

Answer 1

Correct answer is (a) Factor

The explanation is: Factor variables are categorical variables that hold the string or numeric values. Factor variables are used in various types of graphics and particularly for statistical modelling where a correct number of degrees of freedom is assigned to them.