[Rd] key-value mapping in C inside R?

Hadley Wickham hadley at rice.edu
Thu Dec 30 21:34:18 CET 2010

Why not use a sparse Matrix package?

On Thu, Dec 30, 2010 at 6:50 AM, Matteo Bertini <matteo at naufraghi.net> 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?
> Thanks,
> Matteo Bertini
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Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University

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