[R-sig-Geo] memory issue on R with Linux 64

[Edzer Pebesma]

Well, this doesn't come as a surprise; if it did for you then you didn't 
read the list archives well.

R has been designed for analysing statistical data, which usually 
doesn't outnumber billions of observations, and not for 
analysis/processing of large grids/imagery.

rgdal has infrastructure to let you go through huge grids by reading and 
writing only parts at a time; you can find pointers to this in the rgdal 
documentation, examples on the list. I don't know of functions that do 
this automatically for you; maybe the raster package on r-forge?

Another option is to buy more ram. I am using debian on a 32 Gb ram 
workstation; I was surprised (really) how little it costed. It saves me 
time.
--
Edzer

Alexander.Herr at csiro.au wrote:
> Hi List,
>
> I get an error using readGDAL{rgdal}: cannot allocate vector of size 3.1 Gb
>
> I am using Linux 64bit (opensuse 11) with 4 gig swap and 4 gig Ram and R 2.8.0. 
>
> The load monitor shows that most of Ram is used up and then when Swap use starts increasing, R returns the error.
>
> Is there anything I should do within R to circumvent this?
>
>
> Any help appreciated
> Thanks
> Herry
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>   

-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de/
http://www.springer.com/978-0-387-78170-9 e.pebesma at wwu.de