[R] New PLYR issue

Hadley Wickham hadley at rice.edu
Tue Jan 17 19:04:39 CET 2012


> Note that although ddply does a lot for you, it doesn't reproduce all of
> your calculations on all of the data columns like summaryBy does... you have
> to explicitly create every calculated column in your function.

Well, ddply doesn't, but colwise will.

Hadley

-- 
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/



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