ffordered: Add the order of a ff vector of the 'ff' vector 'x'

In ffbase: Basic Statistical Functions for Package 'ff'

Description

Add a ff vector that contains the order of the ff vector x as an attribute. The order can be retrieved using ffordered. Note that you have to assign the result to the original vector x.

Usage

addfforder(x, addsorted = FALSE, ...)

ffordered(x)

ffsorted(x)

Arguments

x	ff vector to be indexed
addsorted	should the sorted values also be stored in ffsorted?
...	parameters that will be passed on to fforder.

Value

The updated vector x

Examples

x <- ff(rnorm(10))

# adds an index to x (note the assignment)
x <- addfforder(x)

# retrieve ffindex
o <- ffordered(x)

o
# use it to sort the original vector
x[o]

ffbase documentation built on Feb. 27, 2021, 5:06 p.m.