expression objects
Try this:
e <- as.expression("A")
identical(parse(text = as.character(e)), e) # FALSE
On 5/2/06, Parlamis Franklin <fparlamis at mac.com> wrote:
if 'e' is a vector of mode 'expression', will the following always return TRUE: identical(e, parse(text = as.character(e))) ?
> (e <- expression(x, y, z, 200*f%/%d, sin(e)))
expression(x, y, z, 200 * f%/%d, sin(e))
> identical(e, parse(text = as.character(e)))
[1] TRUE i have been relying on this fact in some of my code, and would be appreciative of any counterexamples. franklin parlamis
______________________________________________ R-devel at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel