[R-pkgs] plyr version 1.1

From: Hadley Wickham <hadley_at_rice.edu>
Date: Mon, 26 Jul 2010 20:43:59 -0500


plyr is a set of tools for a common set of problems: you need to break down a big data structure into manageable pieces, operate on each piece and then put all the pieces back together. For example, you might want to:

It's already possible to do this with built-in functions (like split and the apply functions), but plyr just makes it all a bit easier with:

Some considerable effort has been put into making plyr fast and memory efficient, and in many cases plyr is as fast, or faster than, the built-in functions.

You can find out more at http://had.co.nz/plyr/, including a 20 page introductory guide, http://had.co.nz/plyr/plyr-intro.pdf. You can ask questions about plyr (and data-manipulation in general) on the plyr mailing list. Sign up at http://groups.google.com/group/manipulatr

plyr 1.1 (2010-07-19) ---------------------------------------------------

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

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Received on Tue 27 Jul 2010 - 11:48:01 EST

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