Romain: Thanks for your helpful response. This works perfectly.
Michael
On Feb 26, 2012, at 8:50 AM, <rom...@r-enthusiasts.com>
<rom...@r-enthusiasts.com> wrote:
> hello,
>
> You can grab the result of dyn.load and use it as the PACKAGE argument of
> Module.
>
> Romain
>
>
> Le 26 févr. 2012 à 01:11, Michael Braun <bra...@mit.edu> a écrit :
>
>> No, what I would like to do is access an Rcpp module from a dynamic library
>> that is not part of a R package (e.g., loaded using dyn.load() ). If I put
>> the code in a package, there is no problem. But what I am getting is:
>>
>>> library(Rcpp)
>>> dyn.load("add.so")
>>> mod=Module("adding")
>>> add=new(mod$adding,1.2,3.4)
>> Error in Module(module, mustStart = TRUE) :
>> Failed to initialize module pointer: Error in
>> FUN("_rcpp_module_boot_adding"[[1L]], ...): no such symbol
>> _rcpp_module_boot_adding in package .GlobalEnv
>>
>> The packages that you reference are all, well, packages, and from what I can
>> tell about .onLoad(), that applies only to packages. And the
>> loadRcppModules function, apparently, must be called from an .onLoad
>> function (because I get an error message to that effect).
>>
>> I have never had a problem loading compiled functions this way; it appears
>> to be only an issue with modules.
>>
>> I would appreciate some helpful suggestions from anyone in R-land who may
>> have had some success with this (e.g., specific documentation pages to look
>> at, code snippets that have worked for others, or other useful suggestions
>> on what to try next). Of course, if what I want to do is known to be
>> impossible, that would also be a helpful response.
>>
>> Respectfully,
>>
>> Michael
>>
>>
>> On Feb 25, 2012, at 3:24 PM, Dirk Eddelbuettel wrote:
>>
>>>
>>> Hi Michael,
>>>
>>> On 25 February 2012 at 19:45, Michael Braun wrote:
>>> | Hi. I would like to start using Rcpp modules in my code, but I am having
>>> some
>>> | trouble loading them into R. Here is an example:
>>>
>>> My personal approach is to follow the path of least resistance on __start
>>> from an existing package__ having the feature I want to use.
>>>
>>> Rcpp comes with modules-using packages as part of the documentation (Rcpp
>>> modules vignette) and unit tests. And there is even a package skeleton
>>> generator (for which you can set an option to use modules).
>>>
>>> And among the now 55 CRAN packages using Rcpp (!!), a few use modules
>>> too. One is my RcppBDT package, there are the two packages by Baptiste (cda,
>>> planar) and probably a few more but one can't tell from the DESCRIPTION.
>>>
>>> Your code may have been fine, but you also need to look at the .onLoad or
>>> .onAttach function etc. So starting from a working stanza really strikes me
>>> as easiest.
>>>
>>> Hth, Dirk
>>>
>>> --
>>> "Outside of a dog, a book is a man's best friend. Inside of a dog, it is too
>>> dark to read." -- Groucho Marx
>>
>>
>>
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Michael Braun
MIT Sloan School of Management
bra...@mit.edu
--------------------------------------------------
View my research at
http://braunm.scripts.mit.edu/
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