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Calculation of group summaries
Seeliger.Curt@epamail.epa.gov
·
Jul 12, 2005
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r-help
I know R has a steep learning curve, but from where I stand the slope looks like a sheer cliff. I'm pawing through the available docs and have come across examples which come close to what I want but...
Calculation of group summaries
Seeliger.Curt@epamail.epa.gov
·
Jul 14, 2005
·
r-help
Several people suggested specific functions (by, tapply, sapply and others); thanks for not blowing off a simple question regarding how to do the following SQL in R: > select year, > site_id, > visit_no, > mean(undercut) AS meanUndercut, > count(undercut) AS...
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