[R] Keeping memory usage low for a big script

[Ken Termiso]

Hi all,

I've got a script that I run on several computers, some with much less ram 
than others, and I would like to try and keep the memory usage as low as 
possible. The script creates variables to store intermediate results of 
calculations, and then at the end writes a text file with the results of the 
calculations.

Is a quick and dirty way to accomplish this to use rm() to delete objects no 
longer in use, and then run gc()? ...or is there a better way?

Thanks in advance,
Ken