R help - May 2011 - loading only parts of RData files?

Dear List members,


I would like to load R objects saved as RData file but ran into the problem that
these objects are too large for my RAM ('Can not allocate vactor of size
XX...'). Switching to a Linux machine is no option, neither is raising the
memory limit.

I am now wondering whether it is possible to load only specific single objects
saved in these *.RData files into the workspace. As these objects usually are
multidimensional arrays, ideally I would be able to load only specific
dimensions of these arrays. IS there any possibility to do such in R?

I know that NCDF files (and the RNetCDF package) provides possibilities to only
read specific parts of the data into the memory, but I switching to this format
would involve a lot of hassle so I would prefer to stay with something as
convenient as save() and load() without switching to non R file formats.


Thanks for any suggestions
Jannis

Hi,

g.data  is perhaps a interesting package for you.

HTH,
Christian
> Dear List members,
>
>
> I would like to load R objects saved as RData file but ran into the problem
that these objects are too large for my RAM ('Can not allocate vactor of
size XX...'). Switching to a Linux machine is no option, neither is raising
the memory limit.
>
> I am now wondering whether it is possible to load only specific single
objects saved in these *.RData files into the workspace. As these objects
usually are multidimensional arrays, ideally I would be able to load only
specific dimensions of these arrays. IS there any possibility to do such in R?
>
> I know that NCDF files (and the RNetCDF package) provides possibilities to
only read specific parts of the data into the memory, but I switching to this
format would involve a lot of hassle so I would prefer to stay with something as
convenient as save() and load() without switching to non R file formats.
>
>
> Thanks for any suggestions
> Jannis
>
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