On Wed, Dec 3, 2008 at 2:06 AM, Prof Brian Ripley <[EMAIL PROTECTED]> wrote: > On Tue, 2 Dec 2008, hadley wickham wrote: > >>> The underlying issue is actually not in transform() but in data.frame(): >>> >>>> aq <- airquality[sample(1:153,6),] >>>> data.frame(aq, list(a=1,b=2)) >>> >>> Error in data.frame(aq, list(a = 1, b = 2)) : >>> arguments imply differing number of rows: 6, 1 >>>> >>>> data.frame(aq, list(a=1)) >>> >>> Ozone Solar.R Wind Temp Month Day a >>> 3 12 149 12.6 74 5 3 1 >>> 31 37 279 7.4 76 5 31 1 >>> 34 NA 242 16.1 67 6 3 1 >>> 65 NA 101 10.9 84 7 4 1 >>> 59 NA 98 11.5 80 6 28 1 >>> 133 24 259 9.7 73 9 10 1 >>> >> >> Is this a bug or a "feature"? > > As documented: > > Objects passed to data.frame should have the same number of rows, but > atomic vectors, factors and character vectors protected by I will be > recycled a whole number of times if necessary. > > How did you manage to miss that in the help page?
Because it's not true? # These work: data.frame(data.frame(1:10), data.frame(1)) data.frame(data.frame(1:10), data.frame(1), data.frame(5)) data.frame(data.frame(1:10, 1), data.frame(5)) # This doesn't data.frame(data.frame(1:10), data.frame(1, 5)) Clearly there are situations in which data frames _are_ recycled. Hadley -- http://had.co.nz/ ______________________________________________ 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.
