[R-Forge #5205] duplicated.data.table should have a "fromLast" argument similar to base

[arunsrinivasan]

Submitted by: Arun ; Assigned to: Arun ; R-Forge link

As the title implies...

On data.frames:

set.seed(450)
df <- data.frame(x=sample(2, 10,TRUE), y=sample(3, 10, TRUE))

duplicated(df)
#  [1] FALSE FALSE FALSE  TRUE FALSE  TRUE FALSE  TRUE  TRUE  TRUE
duplicated(df, fromLast=TRUE)
#  [1]  TRUE  TRUE  TRUE FALSE FALSE FALSE  TRUE  TRUE FALSE FALSE

On data.tables:

require(data.table)
dt <- data.table(df)
duplicated(dt)
#  [1] FALSE FALSE FALSE  TRUE FALSE  TRUE FALSE  TRUE  TRUE  TRUE

But, doesn't have a fromLast parameter.