Add the order of a ff vector of the ff vector x
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.
addfforder(x, addsorted = FALSE, ...) ffordered(x) ffsorted(x)
x |
|
addsorted |
should the sorted values also be stored in |
... |
parameters that will be passed on to |
The updated vector x
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]
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