[Rd] ":::" operator doesn't work with data object Ecdat:::Crime

[Spencer Graves]

  The ":::" operator doesn't work for me with "Ecdat:::Crime" on 
either macOS 10.15.3 or Windows 10.



  A different but related issue is that "plm::Crime" says "Error: 
'Crime' is not an exported object from 'namespace:plm'", even though 
"library(plm); data(Crime); Crime" works.  I would naively think a user 
should be able to compare "Crime" objects documented in different 
packages using the "::" and ":::" operators, even if a package 
maintainer chooses not to "export" data objects.



  What do you think?


  Thanks,
  Spencer Graves


*** The following is from my Mac;  I could give you the comparable 
results from Windows 10 if you want it.



> dim(Ecdat::Crime)
[1] 630  24
> Ecdat:::Crime
Error in get(name, envir = asNamespace(pkg), inherits = FALSE) :
  object 'Crime' not found
> sessionInfo()
R version 3.6.3 (2020-02-29)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Catalina 10.15.3

Matrix products: default
BLAS: 
/System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: 
/Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libRlapack.dylib


locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.3 lattice_0.20-40
 [3] mvtnorm_1.1-0  BMA_3.18.12
 [5] Ecdat_0.3-7    rrcov_1.5-2
 [7] MASS_7.3-51.5  leaps_3.1
 [9] grid_3.6.3 pcaPP_1.9-73
[11] stats4_3.6.3   TeachingDemos_2.10
[13] Ecfun_0.2-4    robustbase_0.93-5
[15] xml2_1.2.5 Matrix_1.2-18
[17] splines_3.6.3  tools_3.6.3
[19] DEoptimR_1.0-8 jpeg_0.1-8.1
[21] survival_3.1-11    compiler_3.6.3
[23] inline_0.3.15  fda_2.4.8.1


[1] The six "Crime" objects I found were in the following packages: 
Ecdat,  BSDA, plm, mosaicModel, statisticalModeling, and gpk.


__
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

Re: [Rd] ":::" operator doesn't work with data object Ecdat:::Crime

[Abby Spurdle]

Crime?
(Macavity, Macavity, ..., and when you reach the scene of crime
Macavity's not there...)

I suspect your data objects are like Macavity, they're not there.

I found this in the R Internals 1.17.

Lazy-load databases are loaded into the exports for a package, but not
into the namespace environment itself. Thus they are visible when the
package is attached, and also via the :: operator. This was a
deliberate design decision...

The manual is not explicit about the converse, but implies (I think)
that the converse is true.
(i.e. Non-lazyloaded datasets are not supposed to available via this mechanism).

I didn't check your examples.

Are your examples lazyloaded?
And are they any different from other similar packages/datasets?


>A different but related issue is that "plm::Crime" says "Error:
> 'Crime' is not an exported object from 'namespace:plm'", even though
> "library(plm); data(Crime); Crime" works.  I would naively think a user
> should be able to compare "Crime" objects documented in different
> packages using the "::" and ":::" operators, even if a package
> maintainer chooses not to "export" data objects.
>What do you think?

__
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel