On Sat, 23 Jul 2022 21:00:25 -0400 Ben Tupper <btup...@bigelow.org> wrote:
> Could this be related to a new if() behavior introduced in v4.2.0 ? > See the "SIGNIFICANT USER-VISIBLE CHANGES" for v4.2.0 in the NEWS > > https://cloud.r-project.org/doc/manuals/r-release/NEWS.html No. What's going on is much weirder than that, and looks to me like a bug has been introduced in formula() or in something related. My impression is that if the right hand side of a formula gets "too long", then it gets split into parts --- which messes everything up. Consider: lhs1 <- paste(paste0("x",1:12),collapse=" + ") f1 <- as.formula(paste("x ~ -1 +",lhs1)) print(length(deparse(f1[[3]]))) You get the value 2. Note that deparse(f1[[3]]) gives [1] "-1 + x1 + x2 + x3 + x4 + x5 + x6 + x7 + x8 + x9 + x10 + x11 + " [2] " x12" If we shorten the right hand side of the formula just a wee bit lhs2 <- paste(paste0("x",1:11),collapse=" + ") f2 <- as.formula(paste("x ~ -1 +",lhs2)) then deparse(f2[[3]]) is of length 1, as it should be: > > deparse(f2[[3]]) > [1] "-1 + x1 + x2 + x3 + x4 + x5 + x6 + x7 + x8 + x9 + x10 + x11" I could of course be missing something, but it really looks to me as if something has gone up to Puttee here. Some input from someone in R-Core would be valuable here. cheers, Rolf Turner -- Honorary Research Fellow Department of Statistics University of Auckland Phone: +64-9-373-7599 ext. 88276 ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
