On Mon, 31 Jan 2005, Prof Brian Ripley wrote:
This is covered, copiously, in the examples in `Writing R Extensions'. Hint: search for coerceVector.
I see. I thought that INTEGER and its relatives did coercion too, but now I see that is not stated anywhere.
Eg. REAL is first used in "Writing R Extensions" in 4.7.1 as in
REAL(ab)[0] = 123.45 ...
and I cannot find a discussion about what it does previous to that, or indeed afterwards.
In Rinternals header file, it says
/* Under the generational allocator the data for vector nodes comes immediately after the node structure, so the data address is a known ofset from the node SEXP. */
This does not mean much to me. Perhaps a short comment in the documentation would be helpful, if not already present.
Faheem.
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