[R] merge data frames taking mean/mode of multiple macthes

[avneet singh]

Hello :)

I have two data frames, one has properties taken on a
piece by piece basis and the other has performance on
a lot by lot basis. I wish to combine these two data
frames but the problem is that each lot has multiple
pieces and hence i need to take a mean of the
properties of multiple pieces and match it to the row
having data about the lot.

I was wondering if there is a simple commmand, an
extension of "merge", or an option of merge i do not
know which could easily do this work.

Thank you  :)

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