Hi Frederic, It looks like you have a number of daily rainfall values and you want to get the mean rainfall on days where there was some rain. What you probably want is:
daily_rainfall<-rpois(50,2) mean(daily_rainfall[daily_rainfall>0]) You may have to add na.rm=TRUE if there are NAs in your data. Jim On Wed, May 13, 2015 at 4:38 PM, Frederic Ntirenganya <ntfr...@gmail.com> wrote: > Hi All, > > I want to compute Mean rain per rain day from rainfall data but i don't > know how to go about that. Anyone who understand the approach I can use can > help me. In addition, I would like to have RScript which can help me to > compute it. thanks. > > Regards, > Frederic. > > Frederic Ntirenganya > Maseno University, > African Maths Initiative, > Kenya. > Mobile:(+254)718492836 > Email: fr...@aims.ac.za > https://sites.google.com/a/aims.ac.za/fredo/ > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.