user defined imputation method

[yonicd]

in {mice} there is no S3 to add a user defined imputation method, only built in methods.

I created a global function and assigned it to the {mice} namespace, which is then picked up by the wrapper function and things work fine be it in a ad-hoc solution.

Now I want to create a package that uses that function without assigning it to the global environment which triggers R CMD CHECK.

Is there a way to do this that I am missing?

https://github.com/stefvanbuuren/mice/blob/7b5aa7012ae10af07fb9bc395a97f461007cf6a8/R/sampler.R#L217_L224

[stefvanbuuren]

Several authors have contributed mice imputation functions in packages. Did you check how others, for example https://github.com/alexanderrobitzsch/miceadds, have implemented this?

[yonicd]

thank you for the reference!

[yonicd]

Looking at that link, it seems that @alexanderrobitzsch forked {mice} and adjusted (adding more imputation functions and Rcpp calls) to his needs.

[stefvanbuuren]

OK, the miceadds approach is easy, and it works.

Perhaps, instead of trying to change the mice namespace, you could try to alter the environment of your new function. See https://stackoverflow.com/questions/3094232/add-objects-to-package-namespace.

[yonicd]

Thanks for the link.

This is what I did in the adhoc solution. I couldn't get this to work for internal function of my package that I am building.

ie

mypkg:::foo is forced by construct to be part of mypkg namespace. If I force that function into the .GlobalEnv then I can set the environment to another ns like in the link you sent, but that raises a flag in R CMD CHECK since I am exporting an object to the .GlobalEnv

[stefvanbuuren]

I am afraid I have no further suggestions.

[yonicd]

ok. thank you for the links. i'll ping again if I find a solution (other than forking)