Does it make sense to talk about the class of the output of substitute(...)? I'm puzzled by the following outputs:
ee <- list( A = substitute( a <- 1 ), B = substitute({ a <- 1 }), C = substitute(( a <- 1 )), D = substitute( a == 1 ) ) > t(sapply(ee, FUN=function(e) { c(typeof=typeof(e), mode=mode(e), > class=class(e)) })) typeof mode class A "language" "call" "<-" B "language" "call" "{" C "language" "(" "(" D "language" "call" "call" That the mode in C is "(", is motivated in help("mode"): "that some calls have mode "(" which is S compatible." However, what's the explanation for the different classes? Is that intended or just "garbage" output? Thanks, Henrik ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel