problems with memory in Mac

Dear friends,

I am having some doubts about the amount of memory that is being used by 
R in my Mac (MacBook Pro, 2Gig). Is there a way to increase the amount 
of memory used?

When I type:

 > mem.limits()

the result is:

nsize vsize
   NA    NA

and I can't change it, tough my computing in R isn't using all the 
memory at it's disposal.

Best regards,
Carlos

Carlos GUERRA

Gabinete de Sistemas de Informacao Geografica
Escola Superior Agraria de Ponte de Lima
Mosteiro de Refoios do Lima
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