> On 15 Apr 2020, at 13:20, Ivan Krylov <krylov.r...@gmail.com> wrote: > > On Wed, 15 Apr 2020 10:41:41 +0300 > Adrian Dușa <dusa.adr...@gmail.com> wrote: > >> Now, if I could find a way to define "=>" as a standalone operator, >> and convince the R parser to bypass that error, it would solve >> everything. If this is not possible, I am back to detecting "->". > > Just to confirm, are you avoiding custom %operators% because of two > extra percent characters one would have to type per operator?
Yes, that's right. The "->" operator is the standard way to signal sufficiency into a SOP (sum of products) expression, something like: A~BC + BC~D + E -> Y This is consistently used in many books and articles, and currently the standard when quoted: "A~BC + BC~D + E -> Y" To require using the %% notation in unquoted strings would make the SOP expression different from the quoted one, which is likely to create confusion: A~BC + BC~D + E %->% Y If detecting "->" proves to be impossible, then I will probably have no choice but to stick with quoted expressions. I am just hoping the collective knowledge here would make this possible, though. Best, Adrian — Adrian Dusa University of Bucharest Romanian Social Data Archive Soseaua Panduri nr. 90-92 050663 Bucharest sector 5 Romania https://adriandusa.eu ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
