From kevin.hendricks at sympatico.ca  Fri Jul 28 19:23:23 2006
From: kevin.hendricks at sympatico.ca (Kevin B. Hendricks)
Date: Fri, 28 Jul 2006 13:23:23 -0400
Subject: [Rd] Any interest in "merge" and "by" implementations
	specifically for sorted data?
In-Reply-To: <Pine.GSO.4.31.0607280805550.24504-100000@markov.stats>
References: <Pine.GSO.4.31.0607280805550.24504-100000@markov.stats>
Message-ID: <FFDE23C5-EA11-4E16-B372-012DB00BD589@sympatico.ca>

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



[Rd] Any interest in "merge" and "by" implementations specifically for sorted data?
Kevin B. Hendricks