On Tue, 29 May 2007 [EMAIL PROTECTED] wrote: > # then I want to do the sum per hour > > z_sum_per_hour <- aggregate(na.omit(z), function(x) as.POSIXct(trunc(x, > "hour")),sum) > Warning message: > some methods for âzooâ objects do not work if the index entries in > âorder.byâ are not unique in: zoo(rval[i], x.index[i]) > > Do anyone has an idea how to avoid that ?
The warning does not come from the aggregate() call, but from the na.omit() call. After omitting the NAs, you have still duplicated time stamps, hence the warning is issued again. After that, aggregating works fine and produces no warnings. Z ______________________________________________ [email protected] 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.
