Ordering Factor Levels
Ordered factors levels are an extension of factors. It arranges the levels in increasing order. We use two functions: factor() and argument ordered().
Syntax: factor(data, levels =c(“”), ordered =TRUE)
Parameter:
- data: input vector with explicitly defined values.
- levels(): Mention the list of levels in c function.
- ordered: It is set true for enabling ordering.
Example:
R
# creating size vectorsize = c("small", "large", "large", "small", "medium", "large", "medium", "medium") # converting to factorsize_factor <- factor(size) print(size_factor)# ordering the levelsordered.size <- factor(size, levels = c( "small", "medium", "large"), ordered = TRUE) print(ordered.size) |
Output:
[1] small large large small medium large medium medium Levels: large medium small [1] small large large small medium large medium medium Levels: small < medium < large
In the above code, the size vector is created using the c function. Then it is converted to a factor. And for the ordering factor, the () function is used along with the arguments described above. Thus the sizes are arranged in order.
The same can be done using the ordered function. An example of the same is shown below:
Example:
R
# creating vector sizesize = c("small", "large", "large", "small", "medium", "large", "medium", "medium") sizes <- ordered(c("small", "large", "large", "small", "medium"))# ordering the levelssizes <- ordered(sizes, levels = c("small", "medium", "large")) print(sizes) |
Output:
[1] small large large small medium Levels: small < medium < large
Level Ordering of Factors in R Programming
In this article, we will see the level ordering of factors in the R Programming Language.
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