Dear R-devel, There is a new feature in R-devel, which explicitly refers to LISP @ operator for splicing.
> The backquote function bquote() has a new argument splice to enable splicing > a computed list of values into an expression, like ,@ in LISP's backquote. Although the most upvoted SO question asking for exactly LISP's @ functionality in R doesn't seems to be addressed by this new feature. Is it possible to use new splice feature to create `6 - 5 + 4` expression rather than `6 - (5 + 4)`? b = quote(5+4) b #5 + 4 c = bquote(6-.(b)) c #6 - (5 + 4) d = bquote(6-..(b), splice=TRUE) d #6 - (5 + 4) There is corresponding LISP code provided CL-USER> (setf b `(5 + 4)) (5 + 4) CL-USER> (setf c `(6 - ,@b)) (6 - 5 + 4) CL-USER> (setf c-non-spliced `(6 - ,b)) (6 - (5 + 4)) CL-USER> Thanks, Jan Gorecki ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
