Josh, Good point about including an example.
calling xcoredata() does work, but only for a *single* row of the data at a time. In R, I'm used to passing an entire data structure or vector to a function and automatically getting back a vector of all the results. In this case, it doesn't work that way. The attr() function is probably the best solution. Thanks! -- Noah Silverman UCLA Department of Statistics 8117 Math Sciences Building Los Angeles, CA 90095 On Aug 20, 2011, at 1:03 AM, Joshua Wiley wrote: > Hi Noah, > > This is one of those cases where following the posting guide > (particularly the minimal, reproducible example part) would have > really helped. Are you saying that calling: > xcoredata(your_xts_object) does not give you the internal > representation of time that you want? > > data(sample_matrix) > sample.xts <- as.xts(sample_matrix, descr='my new xts object') > # returns a list, the index is the numeric representation of time > displayed in the rows > xcoredata(sample.xts) > > You could also try the more direct: > > attr(xts_object, "index") > > If this is not what you want or is not working for you, providing us > the output of dput() from the first few rows of your dataset and an > example of what you do want would be spectacular. > > Cheers, > > Josh > > On Sat, Aug 20, 2011 at 12:44 AM, Noah Silverman <noahsilver...@ucla.edu> > wrote: >> Hi, >> >> I have a very large data set stored as an xts object. >> >> xts is very nice about showing row labels as "human readable" dates and >> times. >> >> I want the actual epoch values that are stored internally. The only way I >> can find to access them is one-at-a-time using the internal function: >> xcoredata() >> >> Calling this in an entire column, the "R" way doesn't work. It will only >> return a single value. Calling it in a loop for each row works but is >> painfully slow. >> >> Since the epoch is stored internally, there must be some way to just grab it >> as a vector. Does anyone know how? >> >> Thanks! >> >> -- >> Noah Silverman >> UCLA Department of Statistics >> 8117 Math Sciences Building >> Los Angeles, CA 90095 >> >> ______________________________________________ >> 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. >> > > > > -- > Joshua Wiley > Ph.D. Student, Health Psychology > Programmer Analyst II, ATS Statistical Consulting Group > University of California, Los Angeles > https://joshuawiley.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.
