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The four most frequently used types of data objects in R are vectors, matrices, data frames and ________

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The four most frequently used types of data objects in R  are vectors, matrices, data frames and ________

(a) Function

(b) Lists

(c) Packages

(d) Interfaces

This question was addressed to me at a job interview.

Asked question is from Data Types topic in portion Nuts and Bolts and Getting Data In and Out of R Programming

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The correct answer is (b) Lists

The explanation: The four most frequently used types of data objects in R are vectors, matrices, data frames and lists. A list is a generalisation of a vector and represents a collection of data objects.

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