On Tue, Sep 27, 2011 at 5:23 AM, Agustin Lobo <agustin.l...@ictja.csic.es> wrote: > I have the following time series: > >> class(CCasadesz2) > [1] "zoo" >> setmanes <- cut(time(CCasadesz2),breaks="weeks") >> CCasadeswz <- aggregate(CCasadesz2,sum,by=setmanes)
cut produces a "factor", not a "Date". The by= argument in aggregate.zoo should not be a factor but rather should define the new index. If you want the new index to be a "Date" class then by= should define a "Date" vector. See ?aggregate.zoo . Try: setmanes <- as.Date(format(setmanes)) -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.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.
