Well Gabor, this is actually a really good help, thanks so much. There is only one problem, I'm getting what you say, but in the code there are a couple of errors
time(z2) <- as.Date(time(zz)) #probably z2 z3 <- na.locf( cbind(zz, zoo(, dd), #dd object not found day.of.month = as.numeric(format(time(zz), "%d")) )) z3$day.of.month <- as.numeric(format(time(zz2), "%d")) #z2? And why did you call partial this solution? Thanks again for you great help Take care Gabor Grothendieck wrote: > > Here is a partial solution: > > library(zoo) > # z is CPI. Just use 1, 2, 3, ... for example. > z <- zooreg(1:12, as.yearmon("2008-01"), freq = 12) > days.in.month <- as.numeric(as.Date(time(z), frac = 1) - as.Date(time(z)) > + 1) > z2 <- cbind(z, z1 = lag(z, -1), z2 = lag(z, -2), z3 = lag(z, -3), > days.in.month) > time(z2) <- as.Date(time(zz)) > z3 <- na.locf( > cbind(zz, > zoo(, dd), > day.of.month = as.numeric(format(time(zz), "%d")) > )) > z3$day.of.month <- as.numeric(format(time(zz2), "%d")) > # now each row of z3 has all the data you need so apply(z3, 1, > your.function) > > > On Fri, Apr 17, 2009 at 2:13 PM, manta <mantin...@libero.it> wrote: >> >> any update anybody? I'm really stucked! >> -- >> View this message in context: >> http://www.nabble.com/From-daily-series-to-monthly-and-viceversa-tp23064454p23103052.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. > > -- View this message in context: http://www.nabble.com/From-daily-series-to-monthly-and-viceversa-tp23064454p23115847.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.