[Rd] key-value mapping in C inside R?
simon.urbanek at r-project.org
Thu Dec 30 16:03:53 CET 2010
On Dec 30, 2010, at 7:50 AM, Matteo Bertini wrote:
> I'm testing some modifications in arima.c.
> I've noticed that a big internal array of double (rbar) is usually sparse and I'd like to add an option to store it as key-value mapping.
> Is there a library function or some other approach already used inside the R core for key-value mappings?
environment created with hash=TRUE, e.g.:
e = new.env(TRUE, emptyenv())
e[["foo"]] = "bar"
You can even set "size" with the expected size if you know it in advance.
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