Description Usage Arguments Examples
Return the length of unique combination of given column names
1 | lengthunique(dtf, ...)
|
dtf |
data frame |
... |
further arguments passed to |
1 2 3 4 | lengthunique(airquality)
lengthunique(airquality, "Month", "Day")
lengthunique(airquality, "Month")
lengthunique(airquality, "Day")
|
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