(Select all that apply) In which of the following situations would you typically use a categorical array?

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Accepted Answer

Lei Hou
Lei Hou on 17 Oct 2021
Hi Sangat,
Typically, categorical is useful when your array is large, contains duplicated values and has finite set of discrete categories. For example, a very long vector of US states. A categorical array provides efficient storage and convenient manipulation of nonnumeric data. Regarding the situations you provided, I would recommend:
  • A list of text where some values in the list are repeated
  • A column in a table that labels which group each row belongs to

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