Clearing up memory in R

There's basically two ways that I know of to clear up memory in R.

1. rm() 
2. gc()

The first one basically removes your variable of vector or data frame from your workspace. But somehow rather the memory can sometimes (or in my case, all the time) still be consumed by R based on Task Manager. That's when garbage collection ( gc() ) comes in handy. 

For more info on gc(), use ?gc

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