[R] Group by in R

[Nick Angelou]

Hi,

I have the following table data:

f1, f2, f3, f4.

I want to compute the counts of unique combinations of f1-f4. In SQL I would
just write:

SELECT COUNT(*) FROM <table> GROUP BY f1, f2, ..,f4.

How to do this in R?

Thanks,

Nick
-- 
View this message in context: http://www.nabble.com/Group-by-in-R-tp23020587p23020587.html
Sent from the R help mailing list archive at Nabble.com.