last

Aggregate function: returns the last value in a group.

Usage

last(x, ...)

# S4 method for class '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

if (FALSE) { # \dontrun{
last(df$c)
last(df$c, TRUE)
} # }