[R] match function or "=="
bozhao86 at hotmail.com
Wed Apr 7 17:15:54 CEST 2010
I have a huge dataset(5000k observations), which contains the daily sales
for each company.
If I want to find out the a company with unique company id number, which
function I should use that is more efficient, match or "=="? For example,
Thank you very much.
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