What do you mean by `a repeatedly ragged array': you haven't defined it?
There is no dataset `barley' in vanilla R. Which one did you mean?
There is a data frame in package lattice, but that is neither an array nor
ragged.
If that is what you want, rank.lists will be a list matrix. The easiest
thing to do is to find out the corresponding row numbers and assign there.
pos - with(barley, tapply(1:120, list(site=site, year=year), na.pass))
barley[unlist(pos), ranks] - unlist(rank.lists)
On Mon, 13 Sep 2004, Wolfram Fischer wrote:
How can I add an extra column containing the rank
to a ragged array indexed by more than one grouping
factors?
E.g. with the barley dataset:
How can I to add an additional column ``rank''
containing the rank of the ``yield'' of
the different varieties in relation to the indices
``year'' and ``site'' to the barley dataframe?
I achieved to calculate the ranks with:
rank.lists -
with( barley, tapply( yield, list( site=site, year=year ), rank ) )
but I do not manage to merge this result
to the original dataframe ``barley''.
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Please do as that asks, including reading its references. We should not
have to guess at the meaning of your subject line, where you got a dataset
from etc.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UKFax: +44 1865 272595
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