Rcpp Rcpp.package.skeleton("mypackage") "rcpp_hello_world";不适用于包“mypackage"的 .Call()； [英] Rcpp Rcpp.package.skeleton("mypackage") "rcpp_hello_world" not available for .Call() for package "mypackage"

问题描述

我已经在 R 提示符下通过以下命令成功地将 Rcpp.package.skeleton 安装到 Windows 中 -

I've managed to get the Rcpp.package.skeleton to INSTALL in Windows by the following commands at the R prompt -

Rcpp.package.skeleton("mypackage")
system("R CMD build mypackage")
system("R CMD INSTALL mypackage")
library(mypackage)

这将创建 mypackage.dll.但是，当我执行以下命令时 -

This creates the mypackage.dll. However when I do the following commands -

rcpp_hello_world <- function(){ .Call( "rcpp_hello_world", PACKAGE = "mypackage")}
rcpp_hello_world()

我收到以下错误:

Error in .Call("rcpp_hello_world", PACKAGE = "mypackage") : 
"rcpp_hello_world" not available for .Call() for package "mypackage"

我运行 sessionInfo() 并得到以下信息:

I run sessionInfo() and I get the following:

attached base packages:
[1] tools     stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] mypackage_1.0 inline_0.3.13 Rcpp_0.11.1

说明我的新 mypackage 在那里.

Stating that my new mypackage is there.

我还能做进一步的检查以了解发生了什么吗?有什么想法吗?

Are there any further checks I can do to see what is happening? Any ideas?

推荐答案

FWIW，我在用 Rcpp 改造现有的 R-only 包时遇到了类似的错误，问题是缺少 useDynLib(mypackage) 在 NAMESPACE 中.

FWIW, I just got a similar error while retrofitting an existing R-only package with Rcpp, and the problem was a missing useDynLib(mypackage) in NAMESPACE.

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