Count
count.Rd
Count the number of rows for each group when we have GroupedData
input.
The resulting SparkDataFrame will also contain the grouping columns.
This can be used as a column aggregate function with Column
as input,
and returns the number of items in a group.
Usage
count(x)
n(x)
# S4 method for GroupedData
count(x)
# S4 method for Column
count(x)
# S4 method for Column
n(x)
Examples
if (FALSE) {
count(groupBy(df, "name"))
}
if (FALSE) count(df$c)
if (FALSE) n(df$c)