last: last

In SparkR: R Front End for 'Apache Spark'

Description

Aggregate function: returns the last value in a group.

Usage

last(x, ...)

## S4 method for signature 'characterOrColumn'
last(x, na.rm = FALSE)

Arguments

x	column to compute on.
...	further arguments to be passed to or from other methods.
na.rm	a logical value indicating whether NA values should be stripped before the computation proceeds.

Details

The function by default returns the last values it sees. It will return the last non-missing value it sees when na.rm is set to true. If all values are missing, then NA is returned. Note: the function is non-deterministic because its results depends on the order of the rows which may be non-deterministic after a shuffle.

Note

last since 1.4.0

See Also

Other aggregate functions: avg(), column_aggregate_functions, corr(), count(), cov(), first()

Examples

## Not run: 
last(df$c)
last(df$c, TRUE)

## End(Not run)

SparkR documentation built on June 3, 2021, 5:05 p.m.