Seems it did work as advertised in R 2.6.0 but is still broken in R-devel. Will take a look.
-roger Gabor Grothendieck wrote: > cut.Date and cut.POSIXt indicate that the breaks argument > can be an integer followed by a space followed by "year", etc. > but it seems the integer is ignored. > > For example, I assume that breaks = "3 months" is supposed > to cut it into quarters but, in fact, it cuts it into months as if > 3 had not been there. > >> d <- seq(Sys.Date(), length = 12, by = "month") >> cut(d, "3 months") > [1] 2008-03-01 2008-04-01 2008-05-01 2008-06-01 2008-07-01 2008-08-01 > 2008-09-01 2008-10-01 2008-11-01 2008-12-01 2009-01-01 2009-02-01 > Levels: 2008-03-01 2008-04-01 2008-05-01 2008-06-01 2008-07-01 > 2008-08-01 2008-09-01 2008-10-01 2008-11-01 2008-12-01 2009-01-01 > 2009-02-01 >> cut(as.POSIXct(d), "3 months") > [1] 2008-03-01 2008-04-01 2008-05-01 2008-06-01 2008-07-01 2008-08-01 > 2008-09-01 2008-10-01 2008-11-01 2008-12-01 2009-01-01 2009-02-01 > Levels: 2008-03-01 2008-04-01 2008-05-01 2008-06-01 2008-07-01 > 2008-08-01 2008-09-01 2008-10-01 2008-11-01 2008-12-01 2009-01-01 > 2009-02-01 >> cut(as.POSIXlt(d), "3 months") > [1] 2008-03-01 2008-04-01 2008-05-01 2008-06-01 2008-07-01 2008-08-01 > 2008-09-01 2008-10-01 2008-11-01 2008-12-01 2009-01-01 2009-02-01 > Levels: 2008-03-01 2008-04-01 2008-05-01 2008-06-01 2008-07-01 > 2008-08-01 2008-09-01 2008-10-01 2008-11-01 2008-12-01 2009-01-01 > 2009-02-01 > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > -- Roger D. Peng | http://www.biostat.jhsph.edu/~rpeng/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel