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Categorical (also called nominal) data can take on a limited number of possible values called categories. Categorical values "label", they do not "measure". Please use [ordinal-data] tag for discrete but ordered data types.
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Whether to use factors in R and when ordered factors?
I've done some searching on StackExchange and become more and more confused about using factors and ordered factors in R modeling.
I've encountered several circumstances:
A variable is characters l …