R help - Sep 2011 - Namespace in packages

Hello,

I wonder how I might create a package that only reveals some of the function
in the package to the user.

I've tried creating an R package using the following:
f <- function(x,y) x+y
g <- function(x,y) x-y
h <- function(x,y) f(x,y)*g(x,y)

package.skeleton(list=c("f","g","h"),
name="mypkg")

and would like only h() to be available when I load it, and exposed.
I tried creating a file called NAMESPACE that has one line:
export(h)
But after running R CMD install, when I try to load it with:
library("mypkg",lib.loc=...) i get "Error in namespaceExport(ns,
exports) :
undefined exports: h"/
What am I doing wrong?


(BTW, side question, if, after loading, i overload f() or g() with a new
definition from the R console, will h() be affected?)

Thanks,
Eran Eidinger.

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On 11-09-01 2:27 AM, Eran Eidinger wrote:
> Hello,
>
> I wonder how I might create a package that only reveals some of the
function
> in the package to the user.
>
> I've tried creating an R package using the following:
> f<- function(x,y) x+y
> g<- function(x,y) x-y
> h<- function(x,y) f(x,y)*g(x,y)
>
> package.skeleton(list=c("f","g","h"),
name="mypkg")
>
> and would like only h() to be available when I load it, and exposed.
> I tried creating a file called NAMESPACE that has one line:
> export(h)
> But after running R CMD install, when I try to load it with:
> library("mypkg",lib.loc=...) i get "Error in
namespaceExport(ns, exports) :
> undefined exports: h"/
> What am I doing wrong?
Your description of what you did sounds like the right thing.

Does your package work without the NAMESPACE file?  I.e. are all of f, g 
and h visible?  I would guess there is something else wrong in it, and h 
is really not there.

> (BTW, side question, if, after loading, i overload f() or g() with a new
> definition from the R console, will h() be affected?)
No.

Duncan Murdoch
>
> Thanks,
> Eran Eidinger.
>
> 	[[alternative HTML version deleted]]
>
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