search for: market_valu

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2009 Jan 28
3
Newbie question about "grouping"
...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]]
2009 Jan 28
2
t.test in a loop
Hi All, I've been having a little trouble with creating a loop that will run a a series of t.tests for inspection, Below is the code i've tried, and some checks i've looked at. I've used the get(paste()) idea as i was told previously that the use of the eval should try and be avoided. I've run a single syntax to check that my systax is correct and works without any problems