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

Matteo Bertini
2010-12-30T12:50:26Z

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