Sorry, one error: On Mon, Jul 30, 2012 at 1:18 PM, Bert Gunter <bgun...@gene.com> wrote: > ?? > > On Mon, Jul 30, 2012 at 11:46 AM, R. Michael Weylandt > <michael.weyla...@gmail.com> wrote: >> On Mon, Jul 30, 2012 at 8:49 AM, Bert Gunter <gunter.ber...@gene.com> wrote: >>> Not necessarily. If the OP really meant the R list() structure, then >>> is.element does not apply. >> >> Perhaps... >> >> x <- list(1:5, "a", `+`, rnorm, NULL, list(letters)) > > Note: >> is.element((1:5),x) > [1] FALSE FALSE FALSE FALSE FALSE > > ##The answer should be TRUE -- the vector (1:5) is a list component. > > Similarly: ##### Should have been:###############
> is.element(list(letters),x) [1] FALSE The answer again should be TRUE. ##################################### > >> is.element(rnorm,x) > Error in match(el, set, 0L) : 'match' requires vector arguments > > ## The answer should be TRUE. > > So I do not understand what your point is. I stand by my claim: > is.element is not intended for lists, and this is made clear (to me, > anyway) in the help file. > > -- Bert > > > > > > >> >> letters %in% x # Works -- vectorized, mostly false, but the "a" is >> there, per below >> "a" %in% x # Works, true >> >> 1 %in% x # Works, false >> 1:5 %in% x # Works -- vectorized, false >> list(1:5) %in% x # Works, true >> >> `+` %in% x # Error >> NULL %in% x # logical(0) >> >> so it seems is.element / %in% [chacun son gout] works with "vectors" >> (in a rather broad sense of that word) >> >> I'm still trying to understand quite how this one works though: >> >> list(letters) %in% x # Works -- false: this one surprised me! >> identical(list(letters), x[[6]]) # True >> >> Best, >> Michael > > > > -- > > Bert Gunter > Genentech Nonclinical Biostatistics > > Internal Contact Info: > Phone: 467-7374 > Website: > http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.
