R devel - Jan 2014 - package NAMESPACE question

Hello,

I'm building a package. My code is stored in foo.R. This code has two
functions FUN1 and FUN2. FUN1 calls FUN2. FUN1 is listed in export() under
the package NAMESPACE but NOT FUN2. After building the package when I call
FUN1 is giving me an error that cannot find FUN2.

I solved this by adding FUN2 in the export() NAMESPACE. However, what is
puzzling me is that I have other examples similar to the above (i.e., one
function calling another but only one exported) in the same package where I
don't get the error message.

Any idea of why that might be the case? My understanding is that export
only controls what is visible to the end user but functions not listed in
export() are still "usable" within the package.

In this case, the reason I'd like to avoid to export FUN2 is so I don't
have to add it in the package documentation.


Any guidance is much appreciated.

Regards,
Axel.

	[[alternative HTML version deleted]]

On 25 January 2014 at 14:38, Axel Urbiz wrote:
| Hello,
| 
| I'm building a package. My code is stored in foo.R. This code has two
| functions FUN1 and FUN2. FUN1 calls FUN2. FUN1 is listed in export() under
| the package NAMESPACE but NOT FUN2. After building the package when I call
| FUN1 is giving me an error that cannot find FUN2.

Then you are doing something wrong in building, or possibly testing, the
package.

"Everything within" can see everything else. 

| I solved this by adding FUN2 in the export() NAMESPACE. However, what is
| puzzling me is that I have other examples similar to the above (i.e., one
| function calling another but only one exported) in the same package where I
| don't get the error message.
| 
| Any idea of why that might be the case? My understanding is that export

We cannot tell without seeing the code.

I suggest you spend two minutes with package.skeleton(), create an empty
package, put something like these two functions in

         multiply <- function(x, k) x * k

         timestwo <- function(x) multiply(x, 2)

to convince yourself that timestwo() can in fact use multiply().

| only controls what is visible to the end user but functions not listed in
| export() are still "usable" within the package.
| 
| In this case, the reason I'd like to avoid to export FUN2 is so I
don't
| have to add it in the package documentation.
| 
| 
| Any guidance is much appreciated.
| 
| Regards,
| Axel.
| 
| 	[[alternative HTML version deleted]]
| 
| ______________________________________________
| R-devel at r-project.org mailing list
| https://stat.ethz.ch/mailman/listinfo/r-devel

-- 
Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com