[R-pkg-devel] data and load version 3

Uwe Ligges ||gge@ @end|ng |rom @t@t|@t|k@tu-dortmund@de
Tue Jun 30 00:52:09 CEST 2020

On 29.06.2020 22:55, Göran Broström wrote:
> I added two data sets (.rda) to my package eha, but when I build the new 
> version I get:
>   WARNING: Added dependency on R >= 3.5.0 because serialized objects in 
> serialize/load version 3 cannot be read in older versions of R.  File(s) 
> containing such objects: ‘eha/data/swedeaths.rda’  ‘eha/data/swepop.rda’
> In DESCRIPTION I have 'Depends: R (>= 3.0.0)'
> After googling for a while (found nothing relevant in 'WRE'), I 
> understand that I have two options: (i) Change 'Depends' in DESCRIPTION 
> as suggested, and (ii) using save with 'version = 2' for the new files.
> And, if I am recommended to choose (i), should I recreate the old data 
> files with 'version = 3'?
> My guess is go for (i) and version = 3 for all data files, but I feel 
> that I need advise.

You may use version 3 for all, but you can also have a mix and only use 
vesion 3 for the new files.

Uwe Ligges
> Thanks, Göran
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