Aaron's answer looks good to me.
Matthew
On 26.11.2012 19:15, leodido wrote:
Hi,
I'm playing with data.table package and I need some help to better
understand it.
I've posted an answer related to it (and related to join table and
aggregate
results data) here
<http://stackoverflow.com/questions/13571359/join-and-sum-not-compatible-matrices-through-data-table>
(Join and sum not compatible matrices through data.table on
stackoverflow).
If someone here can share its knowledge :)
Thanks in advance.
Di Donato Leonardo
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