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

On 2020-06-30 01:07, Jeff Newmiller wrote:
Your choice. Do you want to support people using older versions of R, 
or not?
Is that all? No point at all with version 3 in packages? Why was it 
introduced? I have seen an argument for version 2: "... needed ... to 
support name spaces", but version 3 ...
Format 3 supports efficient serialization of ALTREP objects, that is why 
it was introduced. It also saves the session native encoding and 
converts string on de-serialization when running in different native 
encoding. Documented also in R 3.5 NEWS, in R Internals.

Tomas
G?ran

On June 29, 2020 1:55:02 PM PDT, "G?ran Brostr?m" 
<goran.brostrom at 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, G?ran

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

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