Hi all, My code:
> temp<-outer(release.days,collection.days,'-') > temp<-ifelse(temp>=0,NA,temp) > release.diff<-apply(temp,2,max,na.rm=TRUE) works for one trap and does what I want. That is, it determines the time difference between the collection date of a trap and date of parasitoid release immediately before it, excluding releases that occurred on the same day as the collection. The code above, however, does not give the correct values - those that I have calculated for each trap individually. I am wondering how I can adapt this code for each trap ie. it uses only data associated with a particular trap ID. For instance: > temp<-outer(release.days[Trap],collection.days.2[Trap],'-') > temp<-ifelse(temp>=0,NA,temp) > release.diff.1<-apply(temp,2,max,na.rm=TRUE) calculates the same value for each trap, irrespective of collection day. Thanks in advance Ben -- View this message in context: http://r.789695.n4.nabble.com/Adapting-R-code-for-different-traps-tp3585215p3585215.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.
