How to check the amount of RAM in R

Given the warnings concerning platform-dependency discussed in the earlier comment, you could for example parse /proc/meminfo on Linux:

$ grep MemFree /proc/meminfo 
MemFree:          573660 kB
$ awk '/MemFree/ {print $2}' /proc/meminfo 
565464

You could try the second approach via system(..., intern=TRUE), or even via a pipe connection.

Edit some 5+ years later: In R, and just following what the previous paragraph hinted at:

R> memfree <- as.numeric(system("awk '/MemFree/ {print $2}' /proc/meminfo", 
+                               intern=TRUE))
R> memfree
[1] 3342480
R>

Now you can do that with benchmarkme::get_ram function.

https://cran.r-project.org/web/packages/benchmarkme/benchmarkme.pdf

I would recommend using memuse::Sys.meminfo().

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