Hi all, This makes sense to me, but I would think that recycle0 and collapse should actually be incompatible and paste should throw an error if recycle0 were TRUE and collapse were declared in the same call. I don't think the value of recycle0 should be silently ignored if it is actively specified.
~G On Fri, May 15, 2020 at 11:05 AM Hervé Pagès <hpa...@fredhutch.org> wrote: > Totally agree with that. > > H. > > On 5/15/20 10:34, William Dunlap via R-devel wrote: > > I agree: paste(collapse="something", ...) should always return a single > > character string, regardless of the value of recycle0. This would be > > similar to when there are no non-NULL arguments to paste; collapse="." > > gives a single empty string and collapse=NULL gives a zero long character > > vector. > >> paste() > > character(0) > >> paste(collapse=", ") > > [1] "" > > > > Bill Dunlap > > TIBCO Software > > wdunlap tibco.com > > > > > > On Thu, Apr 30, 2020 at 9:56 PM suharto_anggono--- via R-devel < > > r-devel@r-project.org> wrote: > > > >> Without 'collapse', 'paste' pastes (concatenates) its arguments > >> elementwise (separated by 'sep', " " by default). New in R devel and R > >> patched, specifying recycle0 = FALSE makes mixing zero-length and > >> nonzero-length arguments results in length zero. The result of paste(n, > >> "th", sep = "", recycle0 = FALSE) always have the same length as 'n'. > >> Previously, the result is still as long as the longest argument, with > the > >> zero-length argument like "". If all og the arguments have length zero, > >> 'recycle0' doesn't matter. > >> > >> As far as I understand, 'paste' with 'collapse' as a character string is > >> supposed to put together elements of a vector into a single character > >> string. I think 'recycle0' shouldn't change it. > >> > >> In current R devel and R patched, paste(character(0), collapse = "", > >> recycle0 = FALSE) is character(0). I think it should be "", like > >> paste(character(0), collapse=""). > >> > >> paste(c("4", "5"), "th", sep = "", collapse = ", ", recycle0 = FALSE) > >> is > >> "4th, 5th". > >> paste(c("4" ), "th", sep = "", collapse = ", ", recycle0 = FALSE) > >> is > >> "4th". > >> I think > >> paste(c( ), "th", sep = "", collapse = ", ", recycle0 = FALSE) > >> should be > >> "", > >> not character(0). > >> > >> ______________________________________________ > >> R-devel@r-project.org mailing list > >> > https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Ddevel&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=776IovW06eUHr1EDrabHLY7F47rU9CCUEItSDI96zc0&s=xN84DhkZeoxzn6SG0QTMpOGg2w_ThmjZmZymGUuD0Uw&e= > >> > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-devel@r-project.org mailing list > > > https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Ddevel&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=776IovW06eUHr1EDrabHLY7F47rU9CCUEItSDI96zc0&s=xN84DhkZeoxzn6SG0QTMpOGg2w_ThmjZmZymGUuD0Uw&e= > > > > -- > Hervé Pagès > > Program in Computational Biology > Division of Public Health Sciences > Fred Hutchinson Cancer Research Center > 1100 Fairview Ave. N, M1-B514 > P.O. Box 19024 > Seattle, WA 98109-1024 > > E-mail: hpa...@fredhutch.org > Phone: (206) 667-5791 > Fax: (206) 667-1319 > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel