From mgd at santafe.edu  Wed Dec 13 19:23:21 2006
From: mgd at santafe.edu (Marcus G. Daniels)
Date: Wed, 13 Dec 2006 11:23:21 -0700
Subject: [Rd] data frame subset patch, take 2
In-Reply-To: <200612131303.21982.vdergachev@rcgardis.com>
References: <200612061333.09050.vdergachev@rcgardis.com>	<457EE9DE.7050001@fhcrc.org>	<17791.56721.742238.592970@stat.math.ethz.ch>
	<200612131303.21982.vdergachev@rcgardis.com>
Message-ID: <45804519.7040009@santafe.edu>

Vladimir Dergachev wrote:

>     2. It would be nice to have true hashed arrays in R (i.e. O(1) access 
> times). So far I have used named lists for this, but they are O(n):
>   
new.env(hash=TRUE) with get/assign/exists works ok.  But I suspect its 
just too easy to use named lists because it is easy, and that has bad 
performance ramifications for user code (perhaps the R developers are 
more vigilant about this for the R code itself).



[Rd] data frame subset patch, take 2
Marcus G. Daniels