On Wed, 22 Oct 2008, Pfaff, Bernhard Dr. wrote:
Dear Peter,
many thanks for your swift reply and the enlightenment; much appreciated.
I have cc'ed Achim as the package maintainer of zoo,
...and I have added Gabor, just in case.
in case this thread should have slipt his notice. Just curious, Achim,
will there be a rank.zoo() function in a future release of your package?
I'm not sure - my first reaction would be "no". With time series, there
might be confusion between sorting/ordering/ranking with respect to the
observations vs. with respect to the time index. To clarify that you want
some operation with respect to the data, you can easily say
sort(coredata(z))
etc. This is rather evocative and not that much longer to type than
sort(z). And it would be unclear what the latter should mean exactly.
In the case of rank(z), one could argue that it is meaningful...but
providing rank() without sort() or order() methods might again be
confusing. My first impression would be that the cons outweigh the pros.
Z
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