Message-ID: <FFDE23C5-EA11-4E16-B372-012DB00BD589@sympatico.ca>
Date: 2006-07-28T17:23:23Z
From: Kevin B. Hendricks
Subject: Any interest in "merge" and "by" implementations specifically for sorted data?
In-Reply-To: <Pine.GSO.4.31.0607280805550.24504-100000@markov.stats>
Hi,
I was using my installed R which is 2.3.1 for the first tests. I
moved to the r-devel tree (I svn up and rebuild everyday) for my "by"
tests to see if it would work any better. I neglected to retest
"merge" with the devel version.
So it appears "merge" is already fixed and I just need to worry about
"by".
On Jul 28, 2006, at 3:06 AM, Brian D Ripley wrote:
> Which version of R are you looking at? R-devel has
>
> o merge() works more efficiently when there are relatively few
> matches between the data frames (for example, for 1-1
> matching). The order of the result is changed for 'sort = FALSE'.
>
Thanks,
Kevin