Hi folks:
 
I am a SQL guy who just downloaded and installed R yesterday.  I am
trying to evaluate some "complex" aggregations we are currently
performing with Syncsort (and have tried in Oracle) with R.  I have
loaded data in a dataframe and have performed some of the simple
aggregations on a subset of data.  What I do not see how to do though,
is to "group" the aggregations on a particular key value (e.g., sum
market_value over account_id).
 
If you can point me in the right direction I'd very much appreciate it.
 
Thanks!
 
John

	[[alternative HTML version deleted]]


