Google Data Analytics Professional Certification Practice Test

Which term refers to a group of data elements of the same type in R?

1. Matrix

2. Array

3. Vector

4. List

The correct answer is: Vector

The term that refers to a group of data elements of the same type in R is a vector. In R, a vector is a fundamental data structure that holds elements of the same data type, such as numeric, character, or logical. Vectors can be created using the `c()` function, which combines multiple values into a single object. Vectors are designed to be one-dimensional, making them great for storing sequences of values that need to be processed collectively. For example, if you want to perform arithmetic operations on a series of numbers or analyze a set of categorical labels, using a vector is the most efficient way to handle such tasks in R. Other data types in R, like matrices and arrays, can also hold multiple elements, but they conventionally contain data of the same type and may be multi-dimensional, differentiating them from the simplicity and specificity of a vector’s one-dimensional nature. Lists, on the other hand, can hold elements of different types, making them more versatile but not suitable for instances where uniformity in data type is required.