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Which is more general than a matrix, in that different columns can have different modes?

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Which is more general than a matrix, in that different columns can have different modes?

(a) Data types

(b) Data frames

(c) Data sets

(d) Databases

I had been asked this question in an interview for internship.

This intriguing question originated from Data Types topic in chapter Nuts and Bolts and Getting Data In and Out of R Programming

1 Answer

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Best answer
Correct answer is (c) Data sets

Easy explanation: A data frame is more general than a matrix, in that different columns can have different modes (numeric, character, factor, etc). This is similar to SAS and SPSS datasets. There are many ways to identify the elements of a data frame.

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