Sorry if this is obvious, but `which.max()` is hard-coded in C, with a step at the beginning that attempts to coerce the vector to numeric
https://github.com/r-devel/r-svn/blob/5e0a5f013292e56c73360addb61ddaa7d3ca16a2/src/main/summary.c#L1027 Another alternative (your methods are probably better?) which.max.nv <- function(x) (seq_along(x)[x == max(x)])[1] It seems like too much work to change the definition of package versions (which is a list of integer vectors, under the hood) or to make a generic S3 method for which.max, given that the workarounds are so easy. Also, the documentation explicitly calls out this limitation: x: numeric (logical, integer or double) vector or an R object for which the internal coercion to ‘double’ works whose ‘min’ or ‘max’ is searched for. On Sat, Dec 20, 2025 at 10:35 AM Gabor Grothendieck <[email protected]> wrote: > versions <- c("9.10", "9.2") > nv <- numeric_version(versions) > class(nv) > ## [1] "numeric_version" > > max(nv) # ok > ## [1] ‘9.10’ > > versions[tail(order(nv), 1)] # ok > ## [1] "9.10" > > sort(nv, decreasing = TRUE)[1] # ok > ## [1] ‘9.10’ > > versions[which.max(xtfrm(nv))] # ok > ## [1] "9.10" > > versions[which.max(nv)] # error > ## Error in which.max(nv) : 'list' object cannot be coerced to type > 'double' > > > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
