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Factors are the r-objects which are created using a _________

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Factors are the r-objects which are created using a _________ (a) Vector (b) Matrix (c) Lists (d) Array This question was addressed to me in an interview for internship. Question is taken from Data Types in chapter Nuts and Bolts and Getting Data In and Out of R Programming Select the correct answer from above options

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Correct option is (a) Vector Explanation: Factors are the r-objects which are created using a vector. It stores the vector with also the distinct values of the elements in the vector as labels. They are useful in statistical modelling.

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