Without seeing data, it's only a guess, but you should pass na.rm = TRUE to mean() so it will pass over NaNs in the data :
tapply(HSuccess, Aeventexhumed, mean, na.rm=TRUE) Cheers, Michael On Sun, Apr 1, 2012 at 7:27 PM, Jhope <jeanwaij...@gmail.com> wrote: > Hi R-listers, > > I am using the package plyr. I am just trying to get the hatching success > mean of each nesting event and have typed in the following and received the > below results: > >> tapply(HSuccess, Aeventexhumed, mean) > A B C > 0.2156265 0.1288559 NaN > > What can I do about NaN? I should be able to get a result for event C > because I was able to make a boxplot graph with this information showing all > three nesting events (A, B, and C). > > Please advise, > > Jean > > -- > View this message in context: > http://r.789695.n4.nabble.com/NaN-trouble-fixing-NaN-tp4524713p4524713.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. ______________________________________________ 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.