Message-ID: <CAN2xGJY+CY1za2ZOTynNyuYqNZpurn43Utj6k01RQjtGK8K3sw@mail.gmail.com>
Date: 2013-03-25T22:05:41Z
From: Dimitri Liakhovitski
Subject: Faster way of summing values up based on expand.grid
In-Reply-To: <CAKL8G3HyJKMYjKSEq3a9KbEeTV5pi2_N5jQ_6QxsWpT0=Xamtg@mail.gmail.com>
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