A question on substitute()
Please disregard my previous post. My understanding is correct, and the behavior is **AS DOCUMENTED**. I failed to read the docs carefully. Mea Culpa. Best, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Sun, Dec 13, 2020 at 8:32 PM Bert Gunter <bgunter.4567 at gmail.com> wrote:
I would appreciate any help in correcting my misunderstanding of the following:
substitute(quote(x+a), env = list(a=5))
quote(x + 5) ## as expected
substitute(quote(x+a), env = list2env(list(a=5)))
quote(x + 5) ## as expected
### BUT .GlobalEnv$a
[1] 5
substitute(quote(x+a), env = .GlobalEnv)
quote(x + a) ## unexpected I conclude from this that there is something special about .GlobalEnv that does not allow it to behave as documented for the env argument in ?substitute, to wit: "env: an environment or a list object. Defaults to the current evaluation environment." I would be grateful for any insight, as I am clearly missing something. Note: (though I don't think this matters):
sessionInfo()
R version 4.0.3 (2020-10-10) Platform: x86_64-apple-darwin17.0 (64-bit) Running under: macOS Big Sur 10.16 Cheers to all, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )