How do I clean up R memory without restarting my PC?
r
Solution
Maybe you can try to use the function `gc()`. A call of `gc()` causes a garbage collection to take place. It can be useful to call `gc()` after a large object has been removed, as this may prompt R to return memory to the operating system. `gc()` also return a summary of the occupy memory.
Problem
I am running my code in R (under Windows) which involves a lot of in-memory data. I tried to use `rm(list=ls())` to clean up memory, but seems the memory is still occupied and I cannot rerun my code. I tried to close the R and restart R again, but it is the same. It seems that memory is still occupied, as when I run the code, it says it can't allocate memory (but it could at the first time). The memory only seems to get cleaned up after I restart my PC. Is there any way to clean up the memory so that I can rerun my code without restarting my PC every time?