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Function in summarise() R Language

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The verb summarise() is compatible with almost all the functions in R. Here is a short list of useful functions you can use together with summarise():

Objective Function Description
Basic mean() Average of vector x
median() Median of vector x
sum() Sum of vector x
variation sd() standard deviation of vector x
IQR() Interquartile of vector x
Range min() Minimum of vector x
max() Maximum of vector x
quantile() Quantile of vector x
Position first() Use with group_by() First observation of the group
last() Use with group_by(). Last observation of the group
nth() Use with group_by(). nth observation of the group
Count n() Use with group_by(). Count the number of rows
n_distinct() Use with group_by(). Count the number of distinct observations

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