On 07/07/2018 1:20 PM, Hadley Wickham wrote:
Hi all,Is there are base function that I've missed that tests if an object is a vector in the dimensionality sense, rather than the data structure sense? i.e. something that checks is.null(dim(x)) ? is.vector() is trivially disqualified since it also checks for the presence of non-names attributes: x <- factor(c("a", "a", "b")) is.vector(x) #> [1] FALSE is.null(dim(x)) #> [1] TRUE
I don't know of one. I can't think of nontrivial cases where that distinction matters; do you know of any where base functions act differently on vectors and 1D arrays? (A trivial example is that dimnames(x) gives different results for a named vector and an array with dimnames.)
Duncan Murdoch ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
