On 12/09/2021 10:33 a.m., Leonard Mada via R-help wrote:
How can I avoid evaluation?right = function(x, val) {print("Right");}; padding = function(x) {print("Padding");}; df = data.frame(x=1:5, y = sample(1:5, 5)); ### OK '%=%' = function(x, val) { x = substitute(x); } right(padding(df)) %=% 1; # but ugly ### Does NOT work 'right<-' = function(x, val) { print("Already evaluated and also does not use 'val'"); x = substitute(x); # is evaluated before } right(padding(df)) = 1
That doesn't make sense. You don't have a `padding<-` function, and yet you are trying to call right<- to assign something to padding(df).
I'm not sure about your real intention, but assignment functions by their nature need to evaluate the thing they are assigning to, since they are designed to modify objects, not create new ones.
To create a new object, just use regular assignment. Duncan Murdoch ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
