Wow. Has been a while since the last post. But is doing super busy these days. Lots of data analysis.
Just found a package that is useful in the future for using R to handle big excel dataset: XLConnect.
original post: http://stackoverflow.com/questions/12476044/r-how-to-clear-memory-used-by-rjava
need both XLConnectJars and XLConnect packages to run the function xlcFreeMemory(), which clear the memory used by rJava.
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