These also work in this particular case although not in general and the Call: line in the output differs:
mtcars |> subset(cyl == 4) |> with(lm(mpg ~ disp)) mtcars |> with(lm(mpg ~ disp, subset = cyl == 4)) On Sat, Jun 19, 2021 at 7:23 AM Erez Shomron <erezshom...@mykolab.com> wrote: > > Hello, > > > While playing around with the new forward pipe operator I've noticed > there's a possibly overlooked usage for the operator, which would be > very beneficial to document. > > Whenever you want the LHS to be passed to an argument other than the > first, the documented example demonstrates how to do that with an > anonymous function. > > > However the syntax is less than ideal (aesthetically): > > > mtcars |> subset(cyl == 4) |> (function(d) lm(mpg ~ disp, data = d))() > > > Fortunately there's a better, undocumented option using named arguments: > > > mtcars |> subset(cyl == 4) |> lm(formula = mpg ~ disp) > > > The reason this works, is because of how R matches arguments. As the > language definition states, first named arguments are matched, then > partial matching, and only afterwards positional arguments are matched. > > > I think people that are frustrated with former syntax would be happy to > know the latter option exists. > > > That's just my opinion. > > > Thank you for reading, > > Erez > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
