On Thu, Oct 4, 2012 at 6:12 PM, Bert Gunter <gunter.ber...@gene.com> wrote: > The R Language definition manual explains all of this. Read it.
I always reread that before I post to this list. The only relevant mention of "missing" in the R Language Definition that I could find were in section 4.1.2 on page 25, and that section did not answer anything about "missing" as a special symbol (e.g. that my be put in a formal argument list.) There is another mention of `...` in section 4.3.2 and it does not explain some things, such as under what circumstances one would get a "`...` used in incorrect context" error. Peter >> >> Thanks. >> >> Just so I have my mental model correct, I'm gathering that missing/`` >> is a symbol that the interpreter has a special rule for -- evaluating >> it raises an error, as opposed to objects that evaluate to themselves >> or variable names that evaluate to objects. >> >> Does the same sort of thing explain the behavior of `...`? When the >> interpreter comes across `...` in the arguments during evaluation of a >> call, it trips a special argument-interpolating behavior? >> >> Peter >> >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel > > > > -- > > 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-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel