On 27 August 2012 at 22:36, Peng Yu wrote:
| I have the following two functions which wrap a C++ function differently.
|
| rcpp_hello_world=local({
| sym=getNativeSymbolInfo('rcpp_hello_world', PACKAGE='mypkg')
| function() .Call(sym, PACKAGE='mypkg')
| })
|
| rcpp_hello_world1=function(){
| .Call('rcpp_hello_world', PACKAGE='mypkg')
| }
|
| However, the first one results in some error, when I try to install
| the R package. I guess the problem is that when the package is being
| installed, "mypkg" is not available yet. The solution might be to put
| some code in .onLoad or some code that is executed when the package is
| loaded (not at installation time). However, I don't find an example.
| Does anybody have any experience on how to have the first form of
| .Call in a package? Thanks!
|
| Loading required package: Rcpp
| Error in FUN("rcpp_hello_world"[[1L]], ...) :
| no such symbol rcpp_hello_world in package mypkg
| Calls: roxygenize ... eval -> eval -> getNativeSymbolInfo -> lapply -> FUN
| Execution halted
You posted two methods. One of which works and is supported. Why not use it?
Dirk
--
Dirk Eddelbuettel | e...@debian.org | http://dirk.eddelbuettel.com
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