R help - Jun 2012 - What is tthe meaning of Ncells and Vcells?

Hello,

When I do gc() I got this return:
> gc()
           used  (Mb) gc trigger   (Mb)  max used    (Mb)
Ncells   288952  15.5     968217   51.8 381338927 20365.7
Vcells 57781947 440.9  180578758 1377.8 551082632  4204.5

What does actually means Ncells, Vcells, used and gc trigger?

Thanks,
Rui

On 20/06/2012 9:35 AM, Rui Esteves wrote:
> Hello,
>
> When I do gc() I got this return:
>
> >  gc()
>             used  (Mb) gc trigger   (Mb)  max used    (Mb)
> Ncells   288952  15.5     968217   51.8 381338927 20365.7
> Vcells 57781947 440.9  180578758 1377.8 551082632  4204.5
>
> What does actually means Ncells, Vcells, used and gc trigger?
See the ?gc help page for an overview, and the R Internals manual for 
the details.

Duncan Murdoch