barbara horta e costa wrote: > > I have a data frame with several factors and I want to count the > occurrences > of an event resulting from an interaction of some factors. > > I'd only need a table as excel does with pivot table and summarize data as > count >
"Only" what pivot tables does: Pivot tables are one of the best features of Excel, and it's not always that easy in R. Hadley Wickham who has written the "reshape" package, admitted that he tried to mimic pivot tables in R; the fact that the has not been ripped into piece because of this confession tells a lot. Anyway: give package reshape a try; it comes with a nice tutorial. And if you have more questions, try to construct a very simple example (3 lines!) that runs out of the box and shows your problem. I assume that merge (which does something like SQL join) is not what you need, but I am not sure Dieter -- View this message in context: http://r.789695.n4.nabble.com/count-help-tp2288571p2288764.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
