Assuming, as in your post: set.seed(123) mychron <- chron(sort(runif(10, 0, 10))) breaks <- quantile(mychron)
# is one of these adequate? cut(mychron, breaks) cut(unclass(mychron), unclass(breaks), lab = FALSE) On 8/2/05, Sebastian Luque <[EMAIL PROTECTED]> wrote: > Hello, > > I've encountered the need to cut some chron objects of the form: > > R> mychron <- chron(sort(runif(10, 0, 10))) > R> mychron > [1] (01/01/70 16:36:20) (01/02/70 00:08:46) (01/03/70 16:54:49) > [4] (01/04/70 06:45:00) (01/07/70 06:21:24) (01/07/70 18:28:44) > [7] (01/08/70 00:47:05) (01/08/70 05:11:44) (01/10/70 01:07:53) > [10] (01/10/70 17:46:53) > > into arbitrary (e.g. a given number of minutes, seconds, etc.) units. > Basically, I'm searching for the functionality of cut.Date, which has a > nice 'breaks' argument: > > > ,-----[ *help[R](cut.Date)* (lines: 23 - 30) ] > | breaks: a vector of cut points _or_ number giving the number of > | intervals which 'x' is to be cut into _or_ an interval > | specification, one of '"sec"', '"min"', '"hour"', '"day"', > | '"DSTday"', '"week"', '"month"' or '"year"', optionally > | preceded by an integer and a space, or followed by '"s"'. > | For '"Date"' objects only '"day"', '"week"', '"month"' and > | '"year"' are allowed. > `----- > > 'cut.dates' (from chron itself) allows for cut'ing into months, years, > etc., but not any fractions or multiples of these. > > Converting the chron objects to POSIXct (via 'as.POSIXct') and then using > cut.Date works, but is inconvenient, as it introduces time zone > information. Is there a better way to deal with this? > > Thanks in advance, > -- > Sebastian P. Luque > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html