[R] Matching rows in a Data set? I'm Stuck!!

Wed Mar 3 14:46:49 CET 2010

Unfortunately its complaining that 'by.x' and 'by.y' specify different
numbers of columns'.

I don't really see why that matters if your matching tbh... 

I'm having a few problems. Merge is definitely what I want but my files are
way too big and i'm having memory trouble. Plus I figures out the ID column
isn't unique but I guess i can just use by.y="anotheridentifyingcolumn" to
get around that.
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