[R-pkg-devel] Warning about "serialize/load".

[Travers Ching]

I think the major change was saving of alt-rep objects efficiently.
Example save(1:1e8, file=...) is very efficient.

I'm not sure if that is all that changed it, but I couldn't find
documentation on the differences.

For maximum compatibility in a package, personally I would use version 2.


On Sun, Jul 14, 2019 at 4:52 PM Rolf Turner <r.turner using auckland.ac.nz> wrote:

>
> In a package (say "clyde") that I am building I save a number of
> datasets in clyde/data via something like:
>
> save(melvin,file="~/<whatever>/clyde/data/melvin.rda")
>
> When I build "clyde" I now get warnings like unto:
>
> > 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: 'clyde/data/melvin.rda'
>
> If I put the argument "version=2" into my save() call, the warnings go
> away.
>
> What are the implications of this?
>
> What are the consequences/what is the downside of setting version=2?
>
> What are the consequences/what is the downside of adding the dependency
> on R >= 3.5.0 into my DESCRIPTION file?
>
> Who gets shafted by each of these two possibilities?
>
> Which is recommended?
>
> Grateful for any pearls of wisdom.
>
> cheers,
>
> Rolf Turner
>
> --
> Honorary Research Fellow
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
>
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