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

[Jeff Newmiller]

Your choice. Do you want to support people using older versions of R, or not?

On June 29, 2020 1:55:02 PM PDT, "Göran Broström" <goran.brostrom using umu.se> 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.
>
>Thanks, Göran
>
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-- 
Sent from my phone. Please excuse my brevity.