[R] How to save R "clean" sessions in BATCH mode?

[Douglas Bates]

On Sat, May 16, 2009 at 10:21 AM,  <mcnda839 at mncn.csic.es> wrote:
> Thanks a lot for all of you that have reply me about opening and ending R
> workspaces in BATCH mode. However replies were a king general and I’m afraid
> I could not take the entire message from them. Therefore I chose to expose
> here a representative fraction of my work.
>
> I have 50 Rdata files (F1,F2,F3,F4,…,F50) with objects inside.
> I need to:
>
> open F1:
>   - perform some simple operations with the objects
>   - export the solution with write.table
>   - end F1 session
> open F2
>   repeat procedures as F1
> …
> open F50
>   repeat procedures as F1
> …
>
> My difficulty here is to end a workspace and open one from the scratch to
> avoid mixing files from consecutive worksessions, and thus using R memory
> unnecessarily. I could use rm() to delete objects from the previous sessions
> but it seems not an efficient task.
> Any suggestions on how to perform this in Batch Mode? An examplified help
> would be nice!
First try either

Rcmd BATCH --help # for Windows

or

R CMD BATCH --help # for Mac OS X or for Linux

and note that there are optional arguments --no-save and --no-restore.
 Use them.

> Diogo André Alagador
> http://www.biochange-lab.eu/people/diogo-alagador
> Biodiversity and Global Change Lab, Museo Nacional de Ciencias Naturales,
> CSIC, Madrid, España
> Forest Research Centre, Instituto Superior de Agronomia, UTL, Lisboa,
> Portugal
>
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