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What is an ordered factor?
By Andrie de Vries, Joris Meys. In R, there is a special data type for ordinal data. This type is called ordered factors and is an extension of factors that you’re already familiar with. To create an ordered factor in R, you have two options: Use the factor() function with the argument ordered=TRUE.
What does as ordered mean in R?
as. ordered() function in R Language takes an unordered factor as argument and converts it into an ordered factor.
What does ordered function do in R?
order returns a permutation which rearranges its first argument into ascending or descending order, breaking ties by further arguments. sort. list is the same, using only one argument. See the examples for how to use these functions to sort data frames, etc.
Is Factor a function?
The factor function is used to create a factor. The only required argument to factor is a vector of values which will be returned as a vector of factor values. Both numeric and character variables can be made into factors, but a factor’s levels will always be character values.
Do you know the Order of the levels of a factor?
For most analyses, it will not matter whether a factor is ordered or unordered. If the factor is ordered, then the specific order of the levels matters (small < medium < large).
How to create an ordered factor in Excel?
To order your factor, there are two options. When creating a factor, specify ordered = TRUE and add unique levels in order from least to greatest: For an existing unordered factor like credit_factor, use the ordered () function: Notice the < specifying the order of the levels that was not there before!
What happens when the levels of a factor are unordered?
If the factor is unordered, then the levels will still appear in some order, but the specific order of the levels matters only for convenience (pen, pencil, brush) – it will determine, for example, how output will be printed, or the arrangement of items on a graph.
Why are the results of the ordered factor sorted?
Notice that the results are ordered alphabetically. However, the results of performing the same function on the ordered factor yields results that are easier to interpret because they’re now sorted in the order Lo, Med, Hi: R preserves the ordering information inherent in ordered factors.