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

Matteo Bertini matteo at naufraghi.net
Thu Dec 30 13:50:26 CET 2010

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?

Matteo Bertini

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