[R] restoring .RData with older version of R

[Thomas Lumley]

On Tue, 9 Apr 2002, G. Kroisandt wrote:

> Hi,
>
> I am working at a research institute and I am using R on different
> machines, but for the same data in the same directory.
> Unfortunately, there are also different versions of R running on these
> machines (1.3.0 and 1.4.1).
> The problem is that I cannot get R 1.3.0 running with the .RData file
> created by 1.4.1.
> The same problem arises with objects saved (routine save) in the
> R-format under 1.4.1 when I want to load them in 1.3.0.
>
> The reason for these 2 versions is that I received now another computer
> with version 1.3.0 having a fast processor and a lot of memory, i.e. I
> want to make the computations there. In former times, I had a slow
> computer and had to login to another computer. That one is not so fast
> as my new computer and has not so much memory, however, there is version
> 1.4.1 installed.


You can save the workspace explicitly using the old save format with
    save.image(version=1)
and even make this the default (so it happens on q()) with
    options(save.image.defaults=list(version=1))

More details are in help(save.image).

You would be much better off getting the computer with R 1.3.0 to upgrade
There have been definite improvements since then.

	-thomas

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