From gb at stat.umu.se  Tue Apr  5 20:50:00 2011
From: gb at stat.umu.se (=?iso-8859-1?Q?G=F6ran_Brostr=F6m?=)
Date: Tue, 5 Apr 2011 20:50:00 +0200
Subject: [Rd] Names of a data set in a package
In-Reply-To: <BANLkTimfM4V4X=F2xgSs2VskdhrMmGQjPQ@mail.gmail.com>
References: <4D9B2C92.4000707@stat.umu.se>
	<BANLkTimfM4V4X=F2xgSs2VskdhrMmGQjPQ@mail.gmail.com>
Message-ID: <211B9B55-CC70-4AC0-8DDE-98C808055921@stat.umu.se>


5 apr 2011 kl. 18.25 skrev Gabor Grothendieck:

> 2011/4/5 G?ran Brostr?m <gb at stat.umu.se>:
>> For some reason I want to let one data set in a package be known under two
>> different names.  Is that possible, and if so, how? I do not want to have
>> two copies of the data set in the package.
>> 
> 
> This will allow you to read the data frame under a different name but
> you won't be able to modify it under the different name.  We make use
> of the built in data frame BOD and create the alternate name BOD2:
> 
>> makeActiveBinding("BOD2", function() BOD, .GlobalEnv)
>> BOD$Time
> [1] 1 2 3 4 5 7
>> BOD2$Time
> [1] 1 2 3 4 5 7
>> # changing BOD also changes BOD2
>> BOD$Time[1] <- 99
>> BOD2$Time
> [1] 99  2  3  4  5  7
> 
Thanks Gabor, but where do I put this in my package? To clarify, I want

> data(B, package = "A")

and 

> data(C, package = "A")

refer to the same data set.

G?ran
> 
> -- 
> Statistics & Software Consulting
> GKX Group, GKX Associates Inc.
> tel: 1-877-GKX-GROUP
> email: ggrothendieck at gmail.com



[Rd] Names of a data set in a package
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