Question

最小示例：我有一个R包，其唯一的.R文件包含代码

data.table::data.table(iris)[Species == "setosa"]

预期产出：

    Sepal.Length Sepal.Width Petal.Length Petal.Width Species
 1:          5.1         3.5          1.4         0.2  setosa
 2:          4.9         3.0          1.4         0.2  setosa
 ...

交互式运行良好（使用knitr和r --vanilla进行编译时）。

但是，当我在软件包上运行R CMD INSTALL时，它会失败并显示：

Error in `[.data.frame`(x, i, j) : object 'Species' not found

为什么这只会在R CMD INSTALL中发生，我该如何避免呢？

的详细说明： 的

套餐进口

包描述文件包含

行

Imports: data.table

失败的R CMD INSTALL的成绩单

Rcmd.exe INSTALL --no-multiarch --with-keep.source MYPKG

* installing to library 'C:/Users/.../Documents/R/win-library/3.2'
* installing *source* package 'MYPKG' ...
** R
** inst
** preparing package for lazy loading
Error in `[.data.frame`(x, i) : object 'Species' not found
Error : unable to load R code in package 'MYPKG'
ERROR: lazy loading failed for package 'MYPKG'
* removing 'C:/Users/.../Documents/R/win-library/3.2/MYPKG'
* restoring previous 'C:/Users/.../Documents/R/win-library/3.2/MYPKG'

Exited with status 1.

版本信息

> sessionInfo()
R version 3.2.3 (2015-12-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 8.1 x64 (build 9600)

locale:
[1] LC_COLLATE=Norwegian (Bokmål)_Norway.1252
[2] LC_CTYPE=Norwegian (Bokmål)_Norway.1252
[3] LC_MONETARY=Norwegian (Bokmål)_Norway.1252
[4] LC_NUMERIC=C
[5] LC_TIME=Norwegian (Bokmål)_Norway.1252

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

loaded via a namespace (and not attached):
[1] data.table_1.9.7 chron_2.3-47

Answer 1

您应该始终需要维护NAMESPACE个文件，而不仅仅是DESCRIPTION import(data.table)到NAMESPACE填写将解决您的问题。

data.table在控制台中工作但在R CMD INSTALL时失败

1 个答案: