Hello,
In ?Extract, one can read "An empty index selects all values: this is
most often used to replace all the entries but keep the attributes"
No example is given but if x a vector I interpret this sentence as
"x[]". And in fact, all attributes seem to be preserved by this indexing.
But in the R language manual
(https://cran.r-project.org/doc/manuals/r-devel/R-lang.html#Indexing-by-vectors),
the following passage puzzles me : "Empty. The expression x[] returns x,
but drops “irrelevant” attributes from the result." I must misunderstand
something because it sounds contradictory with the help page.
Thank you
SD
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