[R] access data inside package

[Uwe Ligges]

baptiste Auguié wrote:
> Dear all,
> 
> Happy new year!
> 
> I posted a very similar question a few days ago, but probably too  
> cluttered. Here is a tidy, minimal version:
> 
> I want to make a package, with a data.frame d and a function f given  
> below. Now, the function f needs to use the data.frame d. I could  
> (and that's what I've done temporarily) make a local duplicate of  
> this data.frame in the function definition, but it seems silly.
> 
> I've tried "attach()", "data()", but both fail when running R CMD  
> check with the error
> 
>> * checking R code for possible problems ... NOTE
>> f: no visible binding for global variable 'd'


This is just a note, you can either ignore it or use a dirty trick to 
circumvent Luke's checks by
    d <- get("d")
Perhaps it is better to get from the correct environment by specifying it.

Uwe


> Here is the minimal package skeleton:
> 
>> d <- data.frame(a=1)
>>
>> f <- function(x)
>> {
>> 	data("d")
>> 	x+d$a
>> }
>>
>> package.skeleton(list=c("f","d"), name="mypkg")
> 
> 
> What would be a sensible way to refer to this data inside the package?
> 
> Best regards,
> 
> baptiste
> 
> _____________________________
> 
> Baptiste Auguié
> 
> Physics Department
> University of Exeter
> Stocker Road,
> Exeter, Devon,
> EX4 4QL, UK
> 
> Phone: +44 1392 264187
> 
> http://newton.ex.ac.uk/research/emag
> http://projects.ex.ac.uk/atto
> 
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