You can try the raster package, available from R-forge:
install.packages("raster", repos="http://R-Forge.R-project.org";)
It has very simple raster algebra
r1 <- raster('myfile1.asc')
r2 <- raster('myfile2.asc')
r3 <- r1 + sqrt(r2) + 1
etc.
Robert
On Fri, Jul 31, 2009 at 11:21 AM, Jason Robinson<litobran...@yahoo.com> wrote:
>
> I need to do some raster algebra on some large rasters. right now they are
> ascii files. I'm a complete R novice. Can anyone point me towards a good
> source for figuring out how to get my data into R and how to do very simple
> raster manipulations? no advice is too simple for this guy. appreciate any
> help that is out there
>
> Jason Robinson
>
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